Compare 1387 vs 1391
| Property | 1387 | 1391 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 191 × 731 | 131 × 1071 |
| Prime factorization | 19 × 73 | 13 × 107 |
| Divisors count | 4 | 4 |
| Divisors | 1, 19, 73, 1387 | 1, 13, 107, 1391 |
| Number of properties | 1 | 1 |
| Semiprimes | 410th | 412th |
| Roman numberals | MCCCLXXXVII | MCCCXCI |
| Base 2 | 101011010112 | 101011011112 |
| Base 3 | 12201013 | 12201123 |
| Base 4 | 1112234 | 1112334 |
| Base 5 | 210225 | 210315 |
| Base 6 | 102316 | 102356 |
| Base 7 | 40217 | 40257 |
| Base 8 | 25538 | 25578 |
| Base 9 | 18119 | 18159 |
| Base 10 | 138710 | 139110 |
| Base 11 | 105111 | 105511 |
| Base 12 | 97712 | 97b12 |
| Base 13 | 82913 | 83013 |
| Base 14 | 71114 | 71514 |
| Base 15 | 62715 | 62b15 |
| Base 16 | 56b16 | 56f16 |