Compare 18391 vs 18397
| Property | 18391 | 18397 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 531 × 3471 | 183971 |
| Prime factorization | 53 × 347 | 18397 |
| Divisors count | 4 | 2 |
| Divisors | 1, 53, 347, 18391 | 1, 18397 |
| Number of properties | 1 | 7 |
| Centered heptagonal primes | 20th | |
| Chen primes | 1043rd | |
| Cousin primes (1st member) | 329th | |
| Isolated primes | 1462nd | |
| Lucky primes | 344th | |
| Primes | 2107th | |
| Pythagorean primes | 1042nd | |
| Semiprimes | 4678th | |
| Roman numberals | ||
| Base 2 | 1000111110101112 | 1000111110111012 |
| Base 3 | 2210200113 | 2210201013 |
| Base 4 | 101331134 | 101331314 |
| Base 5 | 10420315 | 10420425 |
| Base 6 | 2210516 | 2211016 |
| Base 7 | 1044227 | 1044317 |
| Base 8 | 437278 | 437358 |
| Base 9 | 272049 | 272119 |
| Base 10 | 1839110 | 1839710 |
| Base 11 | 128aa11 | 1290511 |
| Base 12 | a78712 | a79112 |
| Base 13 | 84a913 | 84b213 |
| Base 14 | 69b914 | 69c114 |
| Base 15 | 56b115 | 56b715 |
| Base 16 | 47d716 | 47dd16 |