| ||||
|---|---|---|---|---|
| Cardinal | eighty-seven | |||
| Ordinal | 87th (eighty-seventh) | |||
| Factorization | 3 × 29 | |||
| Divisors | 1, 3, 29, 87 | |||
| Greek numeral | ΠΖ´ | |||
| Roman numeral | LXXXVII | |||
| Binary | 10101112 | |||
| Ternary | 100203 | |||
| Senary | 2236 | |||
| Octal | 1278 | |||
| Duodecimal | 7312 | |||
| Hexadecimal | 5716 | |||
87 (eighty-seven) is the natural number following 86 and preceding 88.
87 is:
Eighty-seven is also:
10 (ten) is the even natural number following 9 and preceding 11. Ten is the base of the decimal numeral system, the most common system of denoting numbers in both spoken and written language.
15 (fifteen) is the natural number following 14 and preceding 16.
21 (twenty-one) is the natural number following 20 and preceding 22.
111 is the natural number following 110 and preceding 112.
33 (thirty-three) is the natural number following 32 and preceding 34.
38 (thirty-eight) is the natural number following 37 and preceding 39.
69 (sixty-nine) 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.
35 (thirty-five) is the natural number following 34 and preceding 36.
82 (eighty-two) is the natural number following 81 and preceding 83.
85 (eighty-five) is the natural number following 84 and preceding 86.
86 (eighty-six) is the natural number following 85 and preceding 87.
34 (thirty-four) is the natural number following 33 and preceding 35.
55 (fifty-five) is the natural number following 54 and preceding 56.
57 (fifty-seven) is the natural number following 56 and preceding 58.
58 (fifty-eight) is the natural number following 57 and preceding 59.
216 is the natural number following 215 and preceding 217. It is a cube, and is often called Plato's number, although it is not certain that this is the number intended by Plato.
177 is the natural number following 176 and preceding 178.
888 is the natural number following 887 and preceding 889.
99 (ninety-nine) is the natural number following 98 and preceding 100.
262 is a natural number preceded by the number 261 and followed by 263. It has the prime factorization 2·131.