odd, composite · 63rd positive integer
The number 63
63 is an odd composite number. It is the 63rd positive integer.
Quick reference
| Prime factorization | 3 × 3 × 7 |
| Divisors | 1, 3, 7, 9, 21, 63 |
| Binary | 111111 |
| Hexadecimal | 0x3F |
| Roman numeral | LXIII |
| Digit sum | 9 |
| Properties | odd, composite |
Reading 63 in NumGrid context
63 is one of the data points covered by this site’s integer properties and number-guessing puzzles dataset. The detail above comes directly from classical number theory plus NumGrid solver-derived puzzle statistics; the context that follows situates the headline numbers against the broader distribution across positive integers within the NumGrid target pool.
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 63 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 63 a prime number?
No. 63 is composite. Its prime factorization is 3 × 3 × 7.
What are the factors of 63?
The factors (divisors) of 63 are 1, 3, 7, 9, 21, 63.
What is 63 in binary?
63 in binary is 111111. In hexadecimal it's 3F.
What is 63 as a Roman numeral?
63 in Roman numerals is LXIII.
What's the digit sum of 63?
Adding the digits of 63: 6 + 3 = 9.