Compare 381 vs 389
| Property | 381 | 389 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 1271 | 3891 |
| Prime factorization | 3 × 127 | 389 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 127, 381 | 1, 389 |
| Number of properties | 1 | 7 |
| Chen primes | 55th | |
| Emirps | 20th | |
| Isolated primes | 36th | |
| Long primes | 29th | |
| Primes | 77th | |
| Pythagorean primes | 36th | |
| Semiprimes | 119th | |
| Sexy primes (2nd member) | 42nd | |
| Roman numberals | CCCLXXXI | CCCLXXXIX |
| Base 2 | 1011111012 | 1100001012 |
| Base 3 | 1120103 | 1121023 |
| Base 4 | 113314 | 120114 |
| Base 5 | 30115 | 30245 |
| Base 6 | 14336 | 14456 |
| Base 7 | 10537 | 10647 |
| Base 8 | 5758 | 6058 |
| Base 9 | 4639 | 4729 |
| Base 10 | 38110 | 38910 |
| Base 11 | 31711 | 32411 |
| Base 12 | 27912 | 28512 |
| Base 13 | 23413 | 23c13 |
| Base 14 | 1d314 | 1db14 |
| Base 15 | 1a615 | 1ae15 |
| Base 16 | 17d16 | 18516 |