odd, prime · 139th positive integer
The number 139
139 is an odd prime number. It is the 139th positive integer.
Quick reference
| Prime factorization | 139 (prime) |
| Divisors | 1, 139 |
| Binary | 10001011 |
| Hexadecimal | 0x8B |
| Roman numeral | CXXXIX |
| Digit sum | 13 |
| Properties | odd, prime |
Frequently asked
Is 139 a prime number?
Yes. 139 is prime — its only divisors are 1 and itself.
What are the factors of 139?
The factors (divisors) of 139 are 1, 139.
What is 139 in binary?
139 in binary is 10001011. In hexadecimal it's 8B.
What is 139 as a Roman numeral?
139 in Roman numerals is CXXXIX.
What's the digit sum of 139?
Adding the digits of 139: 1 + 3 + 9 = 13.