odd, prime · 397th positive integer
The number 397
397 is an odd prime number. It is the 397th positive integer.
Quick reference
| Prime factorization | 397 (prime) |
| Divisors | 1, 397 |
| Binary | 110001101 |
| Hexadecimal | 0x18D |
| Roman numeral | CCCXCVII |
| Digit sum | 19 |
| Properties | odd, prime |
Frequently asked
Is 397 a prime number?
Yes. 397 is prime — its only divisors are 1 and itself.
What are the factors of 397?
The factors (divisors) of 397 are 1, 397.
What is 397 in binary?
397 in binary is 110001101. In hexadecimal it's 18D.
What is 397 as a Roman numeral?
397 in Roman numerals is CCCXCVII.
What's the digit sum of 397?
Adding the digits of 397: 3 + 9 + 7 = 19.