odd, composite · 39th positive integer
The number 39
39 is an odd composite number. It is the 39th positive integer.
Quick reference
| Prime factorization | 3 × 13 |
| Divisors | 1, 3, 13, 39 |
| Binary | 100111 |
| Hexadecimal | 0x27 |
| Roman numeral | XXXIX |
| Digit sum | 12 |
| Properties | odd, composite |
Reading 39 in NumGrid context
For 39, 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.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
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 39 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 39 a prime number?
No. 39 is composite. Its prime factorization is 3 × 13.
What are the factors of 39?
The factors (divisors) of 39 are 1, 3, 13, 39.
What is 39 in binary?
39 in binary is 100111. In hexadecimal it's 27.
What is 39 as a Roman numeral?
39 in Roman numerals is XXXIX.
What's the digit sum of 39?
Adding the digits of 39: 3 + 9 = 12.