293 (number)

← 292 293 294 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred ninety-three
Ordinal	293rd (two hundred ninety-third)
Factorization	prime
Divisors	1, 293
Greek numeral	ΣϞΓ´
Roman numeral	CCXCIII
Binary	1001001012
Ternary	1012123
Senary	12056
Octal	4458
Duodecimal	20512
Hexadecimal	12516

293 is the natural number following 292 and preceding 294.

In mathematics

293 is:

• a prime number, ^{[1] [2]}
• a Pythagorean prime, ^[3]
• a Sophie Germain prime ^[4]
• a Chen prime ^[5]
• strictly trivially polygonal (number n that is polygonal in only 2 ways: 2-gonal and n-gonal) ^[6]
• equivalent to the sum of the first three tetradic primes. Tetradic numbers are numbers that are the same if written backwards, flipped upside-down, or mirrored upside-down and tetradic primes are tetradic numbers that are also prime. It is the sum of 11 + 101 + 181. ^[7]
• the sum of perfect cubes 2³+2³+3³+5³+5³
• The total number of ways to make change for a dollar in US minted coins including the half-dollar and the dollar coin. ^[8]

In technology

• There is no area code in the United States with 293. There is an area code for +46 293 in Tierp, Sweden. The +46 part locates the code in Sweden and the 293 part locates it as Tierp. ^[9]
• 293T is a cell line in humans that can assist in gene expression or DNA replication. It has been tested on its ability to use certain viruses such as adenoviruses and other mammalian viruses. ^[10]
• The Omni-293 is a type of omni-directional antenna that includes 3.5 GHz of 5G bands. It is designed to be used in both rural and urban locations.<ref "Omni-293 antenna information". poynting.tech.</ref>

World Records

• In 1995, the Bagger 293 was developed by Takraf and was the heaviest machine that could move by itself. It weighs in at 31.3 million lbs. ^[11]
• On December 31, 2012, it was reported that in 2011, the United States was told to have the highest average watch time of TV per day at a 293 minutes. ^[12]
• On April 23, 2019, Jules and You in the Netherlands organized an event where 293 participants were fire breathing simultaneously. ^[13]
• On August 23, 2015, the Purple House Cancer Support in Ireland received the Guinness World Record for the greatest number of people dressed as sumo wrestlers at 293 people. ^[14]
• On May 15, 2018, Alberto Pires in Portugal, at the Lisbon Bar Show, hosted the largest port tasting event with a total of 293 people. ^[15]

Other fields

• The calendar years 293 AD and 293 BC.
• In the French Republican calendar, The year 293 would be a year 5 cycle and be in 2085. ^[16]
• 293 is the number of several different highways in Brazil, Canada, Israel, Japan, and the United States.
• 293 Brasilia is an asteroid in the Asteroid belt. It was discovered by Auguste Charlois in Nice, France. It is an X-type asteroid in the outer parts of the Asteroid belt.^{[ citation needed ]}
• The 293rd Rifle Division was a Red Army rifle division that was formed by Soviet Russia after the German invasion. It often fought with the German 2nd Panzer Group. ^[17]

References

1. "Prime number information". mathworld.wolfram.com.
2. Sloane, N. J. A. (ed.). "SequenceA000040(The prime numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
3. Sloane, N. J. A. (ed.). "SequenceA002144(Pythagorean primes: primes of form 4*k + 1)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
4. Sloane, N. J. A. (ed.). "SequenceA005384(Sophie Germain primes p: 2p+1 is also prime)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
5. Sloane, N. J. A. (ed.). "SequenceA109611(Chen primes: primes p such that p + 2 is either a prime or a semiprime)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
6. Sloane, N. J. A. (ed.). "SequenceA090467(Numbers which are not regular figurative or polygonal numbers of order greater than 2. That is, numbers not of the form 1 + k*n(n-1)/2 - (n-1)^2 where n >= 2 and k >= 2)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
7. "Tetradic numbers and tetradic primes". mathworld.wolfram.com.
8. "Number of ways to make change for a dollar". maa.org.
9. "Sweden area code +46 293". en.codigosinternacionales.com. 14 November 2021.
10. "293t cell line information". tecfinder.stanford.edu.
11. "Bagger 293". www.guinnessworldrecords.com.
12. "Highest rate of tv viewing". www.guinnessworldrecords.com.
13. "293 people fire breathing". www.guinnessworldrecords.com.
14. "293 people dressed as sumo wrestlers". www.guinnessworldrecords.com.
15. "293 people at port tasting event". www.guinnessworldrecords.com.
16. "French Republican Calendar Guide" (PDF). broadcast.lds.org.
17. "About the 293rd infantry division (in Russian)". pamyat-naroda.ru.