odd, prime · 409th positive integer
The number 409
409 is an odd prime number. It is the 409th positive integer.
Quick reference
| Prime factorization | 409 (prime) |
| Divisors | 1, 409 |
| Binary | 110011001 |
| Hexadecimal | 0x199 |
| Roman numeral | CDIX |
| Digit sum | 13 |
| Properties | odd, prime |
Frequently asked
Is 409 a prime number?
Yes. 409 is prime — its only divisors are 1 and itself.
What are the factors of 409?
The factors (divisors) of 409 are 1, 409.
What is 409 in binary?
409 in binary is 110011001. In hexadecimal it's 199.
What is 409 as a Roman numeral?
409 in Roman numerals is CDIX.
What's the digit sum of 409?
Adding the digits of 409: 4 + 0 + 9 = 13.