odd, prime · 23rd positive integer
The number 23
23 is an odd prime number. It is the 23rd positive integer.
Quick reference
| Prime factorization | 23 (prime) |
| Divisors | 1, 23 |
| Binary | 10111 |
| Hexadecimal | 0x17 |
| Roman numeral | XXIII |
| Digit sum | 5 |
| Properties | odd, prime |
Frequently asked
Is 23 a prime number?
Yes. 23 is prime — its only divisors are 1 and itself.
What are the factors of 23?
The factors (divisors) of 23 are 1, 23.
What is 23 in binary?
23 in binary is 10111. In hexadecimal it's 17.
What is 23 as a Roman numeral?
23 in Roman numerals is XXIII.
What's the digit sum of 23?
Adding the digits of 23: 2 + 3 = 5.