Compare 11981 vs 11987
| Property | 11981 | 11987 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 119811 | 119871 |
| Prime factorization | 11981 | 11987 |
| Divisors count | 2 | 2 |
| Divisors | 1, 11981 | 1, 11987 |
| Number of properties | 7 | 4 |
| Chen primes | 735th | 736th |
| Emirps | 325th | |
| Isolated primes | 968th | 969th |
| Long primes | 561st | |
| Primes | 1437th | 1438th |
| Pythagorean primes | 707th | |
| Sexy primes (1st member) | 462nd | |
| Sexy primes (2nd member) | 462nd | |
| Roman numberals | ||
| Base 2 | 101110110011012 | 101110110100112 |
| Base 3 | 1211022023 | 1211022223 |
| Base 4 | 23230314 | 23231034 |
| Base 5 | 3404115 | 3404225 |
| Base 6 | 1312456 | 1312556 |
| Base 7 | 466347 | 466437 |
| Base 8 | 273158 | 273238 |
| Base 9 | 173829 | 173889 |
| Base 10 | 1198110 | 1198710 |
| Base 11 | 900211 | 900811 |
| Base 12 | 6b2512 | 6b2b12 |
| Base 13 | 55b813 | 55c113 |
| Base 14 | 451b14 | 452314 |
| Base 15 | 383b15 | 384215 |
| Base 16 | 2ecd16 | 2ed316 |