odd, composite · 291st positive integer
The number 291
291 is an odd composite number. It is the 291st positive integer.
Quick reference
| Prime factorization | 3 × 97 |
| Divisors | 1, 3, 97, 291 |
| Binary | 100100011 |
| Hexadecimal | 0x123 |
| Roman numeral | CCXCI |
| Digit sum | 12 |
| Properties | odd, composite |
Reading 291 in NumGrid context
The 291 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 291 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
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 291 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 291 a prime number?
No. 291 is composite. Its prime factorization is 3 × 97.
What are the factors of 291?
The factors (divisors) of 291 are 1, 3, 97, 291.
What is 291 in binary?
291 in binary is 100100011. In hexadecimal it's 123.
What is 291 as a Roman numeral?
291 in Roman numerals is CCXCI.
What's the digit sum of 291?
Adding the digits of 291: 2 + 9 + 1 = 12.