odd, composite, perfect square · 289th positive integer
The number 289
289 is an odd composite number. It is the 289th positive integer.
Quick reference
| Prime factorization | 17 × 17 |
| Divisors | 1, 17, 289 |
| Binary | 100100001 |
| Hexadecimal | 0x121 |
| Roman numeral | CCLXXXIX |
| Digit sum | 19 |
| Properties | odd, composite, perfect square |
Reading 289 in NumGrid context
For 289, 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.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 289’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 289 a prime number?
No. 289 is composite. Its prime factorization is 17 × 17.
What are the factors of 289?
The factors (divisors) of 289 are 1, 17, 289.
What is 289 in binary?
289 in binary is 100100001. In hexadecimal it's 121.
What is 289 as a Roman numeral?
289 in Roman numerals is CCLXXXIX.
What's the digit sum of 289?
Adding the digits of 289: 2 + 8 + 9 = 19.