Compare 1390 vs 1391
| Property | 1390 | 1391 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 51 × 1391 | 131 × 1071 |
| Prime factorization | 2 × 5 × 139 | 13 × 107 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 5, 10, 139, 278, 695, 1390 | 1, 13, 107, 1391 |
| Number of properties | 0 | 1 |
| Semiprimes | 412th | |
| Roman numberals | MCCCXC | MCCCXCI |
| Base 2 | 101011011102 | 101011011112 |
| Base 3 | 12201113 | 12201123 |
| Base 4 | 1112324 | 1112334 |
| Base 5 | 210305 | 210315 |
| Base 6 | 102346 | 102356 |
| Base 7 | 40247 | 40257 |
| Base 8 | 25568 | 25578 |
| Base 9 | 18149 | 18159 |
| Base 10 | 139010 | 139110 |
| Base 11 | 105411 | 105511 |
| Base 12 | 97a12 | 97b12 |
| Base 13 | 82c13 | 83013 |
| Base 14 | 71414 | 71514 |
| Base 15 | 62a15 | 62b15 |
| Base 16 | 56e16 | 56f16 |