Compare 389 vs 491
| Property | 389 | 491 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3891 | 4911 |
| Prime factorization | 389 | 491 |
| Divisors count | 2 | 2 |
| Divisors | 1, 389 | 1, 491 |
| Number of properties | 7 | 7 |
| Chen primes | 55th | 66th |
| Cousin primes (2nd member) | 26th | |
| Emirps | 20th | |
| Harmonic primes | 38th | |
| Isolated primes | 36th | 47th |
| Long primes | 29th | 34th |
| Primes | 77th | 94th |
| Pythagorean primes | 36th | |
| Sexy primes (2nd member) | 42nd | |
| Sophie germain primes | 25th | |
| Roman numberals | CCCLXXXIX | CDXCI |
| Base 2 | 1100001012 | 1111010112 |
| Base 3 | 1121023 | 2000123 |
| Base 4 | 120114 | 132234 |
| Base 5 | 30245 | 34315 |
| Base 6 | 14456 | 21356 |
| Base 7 | 10647 | 13017 |
| Base 8 | 6058 | 7538 |
| Base 9 | 4729 | 6059 |
| Base 10 | 38910 | 49110 |
| Base 11 | 32411 | 40711 |
| Base 12 | 28512 | 34b12 |
| Base 13 | 23c13 | 2ba13 |
| Base 14 | 1db14 | 27114 |
| Base 15 | 1ae15 | 22b15 |
| Base 16 | 18516 | 1eb16 |