Compare 11987 vs 11991
| Property | 11987 | 11991 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 119871 | 31 × 71 × 5711 |
| Prime factorization | 11987 | 3 × 7 × 571 |
| Divisors count | 2 | 8 |
| Divisors | 1, 11987 | 1, 3, 7, 21, 571, 1713, 3997, 11991 |
| Number of properties | 4 | 0 |
| Chen primes | 736th | |
| Isolated primes | 969th | |
| Primes | 1438th | |
| Sexy primes (2nd member) | 462nd | |
| Roman numberals | ||
| Base 2 | 101110110100112 | 101110110101112 |
| Base 3 | 1211022223 | 1211100103 |
| Base 4 | 23231034 | 23231134 |
| Base 5 | 3404225 | 3404315 |
| Base 6 | 1312556 | 1313036 |
| Base 7 | 466437 | 466507 |
| Base 8 | 273238 | 273278 |
| Base 9 | 173889 | 174039 |
| Base 10 | 1198710 | 1199110 |
| Base 11 | 900811 | 901111 |
| Base 12 | 6b2b12 | 6b3312 |
| Base 13 | 55c113 | 55c513 |
| Base 14 | 452314 | 452714 |
| Base 15 | 384215 | 384615 |
| Base 16 | 2ed316 | 2ed716 |