Compare 31991 vs 31993
| Property | 31991 | 31993 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 319911 | 131 × 231 × 1071 |
| Prime factorization | 31991 | 13 × 23 × 107 |
| Divisors count | 2 | 8 |
| Divisors | 1, 31991 | 1, 13, 23, 107, 299, 1391, 2461, 31993 |
| Number of properties | 5 | 0 |
| Additive primes | 1554th | |
| Emirps | 698th | |
| Isolated primes | 2451st | |
| Primes | 3432nd | |
| Ulam primes | 263rd | |
| Roman numberals | ||
| Base 2 | 1111100111101112 | 1111100111110012 |
| Base 3 | 11212122123 | 11212122213 |
| Base 4 | 133033134 | 133033214 |
| Base 5 | 20104315 | 20104335 |
| Base 6 | 4040356 | 4040416 |
| Base 7 | 1621617 | 1621637 |
| Base 8 | 763678 | 763718 |
| Base 9 | 477859 | 477879 |
| Base 10 | 3199110 | 3199310 |
| Base 11 | 2204311 | 2204511 |
| Base 12 | 1661b12 | 1662112 |
| Base 13 | 1173b13 | 1174013 |
| Base 14 | b93114 | b93314 |
| Base 15 | 972b15 | 972d15 |
| Base 16 | 7cf716 | 7cf916 |