odd, prime · 491st positive integer
The number 491
491 is an odd prime number. It is the 491st positive integer.
Quick reference
| Prime factorization | 491 (prime) |
| Divisors | 1, 491 |
| Binary | 111101011 |
| Hexadecimal | 0x1EB |
| Roman numeral | CDXCI |
| Digit sum | 14 |
| Properties | odd, prime |
Frequently asked
Is 491 a prime number?
Yes. 491 is prime — its only divisors are 1 and itself.
What are the factors of 491?
The factors (divisors) of 491 are 1, 491.
What is 491 in binary?
491 in binary is 111101011. In hexadecimal it's 1EB.
What is 491 as a Roman numeral?
491 in Roman numerals is CDXCI.
What's the digit sum of 491?
Adding the digits of 491: 4 + 9 + 1 = 14.