249 (two hundred [and] forty-nine) is the natural number following 248 and preceding 250.
| ||||
|---|---|---|---|---|
| Cardinal | two hundred forty-nine | |||
| Ordinal | 249th (two hundred forty-ninth) | |||
| Factorization | 3 × 83 | |||
| Greek numeral | ΣΜΘ´ | |||
| Roman numeral | CCXLIX | |||
| Binary | 111110012 | |||
| Ternary | 1000203 | |||
| Senary | 10536 | |||
| Octal | 3718 | |||
| Duodecimal | 18912 | |||
| Hexadecimal | F916 | |||
Additionally, 249 is:
21 (twenty-one) is the natural number following 20 and preceding 22.
78 (seventy-eight) is the natural number following 77 and preceding 79.
69 is the natural number following 68 and preceding 70. An odd number and a composite number, 69 is divisible by 1, 3, 23 and 69. 69 is a semiprime because it is a natural number that is the product of exactly two prime numbers, and an interprime between the numbers of 67 and 71. Because 69 is not divisible by any square number other than 1, it is categorised as a square-free integer. 69 is also a Blum integer since the two factors of 69 are both Gaussian primes. In number theory, 69 is a deficient number, arithmetic number and a congruent number.
81 (eighty-one) is the natural number following 80 and preceding 82.
82 (eighty-two) is the natural number following 81 and preceding 83.
77 (seventy-seven) is the natural number following 76 and preceding 78. Seventy-seven is the smallest positive integer requiring five syllables in English.
74 (seventy-four) is the natural number following 73 and preceding 75.
57 (fifty-seven) is the natural number following 56 and preceding 58.
62 (sixty-two) is the natural number following 61 and preceding 63.
66 (sixty-six) is the natural number following 65 and preceding 67.
91 (ninety-one) is the natural number following 90 and preceding 92.
93 (ninety-three) is the natural number following 92 and preceding 94.
500 is the natural number following 499 and preceding 501.
In mathematics, an aliquot sequence is a sequence of positive integers in which each term is the sum of the proper divisors of the previous term. If the sequence reaches the number 1, it ends, since the sum of the proper divisors of 1 is 0.
248 is the natural number following 247 and preceding 249.
177 is the natural number following 176 and preceding 178.
230 is the natural number following 229 and preceding 231.
246 is the natural number following 245 and preceding 247.
253 is the natural number following 252 and preceding 254.