Compare 31387 vs 31991
| Property | 31387 | 31991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 313871 | 319911 |
| Prime factorization | 31387 | 31991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 31387 | 1, 31991 |
| Number of properties | 8 | 5 |
| Additive primes | 1554th | |
| Chen primes | 1613th | |
| Cousin primes (1st member) | 484th | |
| Emirps | 698th | |
| Isolated primes | 2415th | 2451st |
| Lucky primes | 525th | |
| Primes | 3382nd | 3432nd |
| Prime triplets (1st member) | 232nd | |
| Sexy primes (1st member) | 990th | |
| Ulam primes | 258th | 263rd |
| Roman numberals | ||
| Base 2 | 1111010100110112 | 1111100111101112 |
| Base 3 | 11210011113 | 11212122123 |
| Base 4 | 132221234 | 133033134 |
| Base 5 | 20010225 | 20104315 |
| Base 6 | 4011516 | 4040356 |
| Base 7 | 1603367 | 1621617 |
| Base 8 | 752338 | 763678 |
| Base 9 | 470449 | 477859 |
| Base 10 | 3138710 | 3199110 |
| Base 11 | 2164411 | 2204311 |
| Base 12 | 161b712 | 1661b12 |
| Base 13 | 1139513 | 1173b13 |
| Base 14 | b61d14 | b93114 |
| Base 15 | 947715 | 972b15 |
| Base 16 | 7a9b16 | 7cf716 |