odd, composite, perfect square · 729th positive integer
The number 729
729 is an odd composite number. It is the 729th positive integer.
Quick reference
| Prime factorization | 3 × 3 × 3 × 3 × 3 × 3 |
| Divisors | 1, 3, 9, 27, 81, 243, 729 |
| Binary | 1011011001 |
| Hexadecimal | 0x2D9 |
| Roman numeral | DCCXXIX |
| Digit sum | 18 |
| Properties | odd, composite, perfect square |
Frequently asked
Is 729 a prime number?
No. 729 is composite. Its prime factorization is 3 × 3 × 3 × 3 × 3 × 3.
What are the factors of 729?
The factors (divisors) of 729 are 1, 3, 9, 27, 81, 243, 729.
What is 729 in binary?
729 in binary is 1011011001. In hexadecimal it's 2D9.
What is 729 as a Roman numeral?
729 in Roman numerals is DCCXXIX.
What's the digit sum of 729?
Adding the digits of 729: 7 + 2 + 9 = 18.