Compare 289 vs 291
| Property | 289 | 291 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 172 | 31 × 971 |
| Prime factorization | 17 × 17 | 3 × 97 |
| Divisors count | 3 | 4 |
| Divisors | 1, 17, 289 | 1, 3, 97, 291 |
| Number of properties | 1 | 1 |
| Semiprimes | 90th | 91st |
| Roman numberals | CCLXXXIX | CCXCI |
| Base 2 | 1001000012 | 1001000112 |
| Base 3 | 1012013 | 1012103 |
| Base 4 | 102014 | 102034 |
| Base 5 | 21245 | 21315 |
| Base 6 | 12016 | 12036 |
| Base 7 | 5627 | 5647 |
| Base 8 | 4418 | 4438 |
| Base 9 | 3519 | 3539 |
| Base 10 | 28910 | 29110 |
| Base 11 | 24311 | 24511 |
| Base 12 | 20112 | 20312 |
| Base 13 | 19313 | 19513 |
| Base 14 | 16914 | 16b14 |
| Base 15 | 14415 | 14615 |
| Base 16 | 12116 | 12316 |