Compare 649 vs 667
| Property | 649 | 667 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 591 | 231 × 291 |
| Prime factorization | 11 × 59 | 23 × 29 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 59, 649 | 1, 23, 29, 667 |
| Number of properties | 1 | 1 |
| Semiprimes | 196th | 199th |
| Roman numberals | DCXLIX | DCLXVII |
| Base 2 | 10100010012 | 10100110112 |
| Base 3 | 2200013 | 2202013 |
| Base 4 | 220214 | 221234 |
| Base 5 | 100445 | 101325 |
| Base 6 | 30016 | 30316 |
| Base 7 | 16157 | 16427 |
| Base 8 | 12118 | 12338 |
| Base 9 | 8019 | 8219 |
| Base 10 | 64910 | 66710 |
| Base 11 | 54011 | 55711 |
| Base 12 | 46112 | 47712 |
| Base 13 | 3ac13 | 3c413 |
| Base 14 | 34514 | 35914 |
| Base 15 | 2d415 | 2e715 |
| Base 16 | 28916 | 29b16 |