odd, composite · 63rd positive integer
The number 63
63 is an odd composite number. It is the 63rd positive integer.
Quick reference
| Prime factorization | 3 × 3 × 7 |
| Divisors | 1, 3, 7, 9, 21, 63 |
| Binary | 111111 |
| Hexadecimal | 0x3F |
| Roman numeral | LXIII |
| Digit sum | 9 |
| Properties | odd, composite |
Frequently asked
Is 63 a prime number?
No. 63 is composite. Its prime factorization is 3 × 3 × 7.
What are the factors of 63?
The factors (divisors) of 63 are 1, 3, 7, 9, 21, 63.
What is 63 in binary?
63 in binary is 111111. In hexadecimal it's 3F.
What is 63 as a Roman numeral?
63 in Roman numerals is LXIII.
What's the digit sum of 63?
Adding the digits of 63: 6 + 3 = 9.