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 |
Reading 729 in NumGrid context
For 729, the underlying data on this page comes from classical number theory plus NumGrid solver-derived puzzle statistics. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for 729 is typically a peer within positive integers within the NumGrid target pool with similar size, similar exposure, or similar geography — not the national-level summary alone.
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.