odd, composite · 87th positive integer
The number 87
87 is an odd composite number. It is the 87th positive integer.
Quick reference
| Prime factorization | 3 × 29 |
| Divisors | 1, 3, 29, 87 |
| Binary | 1010111 |
| Hexadecimal | 0x57 |
| Roman numeral | LXXXVII |
| Digit sum | 15 |
| Properties | odd, composite |
Frequently asked
Is 87 a prime number?
No. 87 is composite. Its prime factorization is 3 × 29.
What are the factors of 87?
The factors (divisors) of 87 are 1, 3, 29, 87.
What is 87 in binary?
87 in binary is 1010111. In hexadecimal it's 57.
What is 87 as a Roman numeral?
87 in Roman numerals is LXXXVII.
What's the digit sum of 87?
Adding the digits of 87: 8 + 7 = 15.