Compare 649 vs 669
| Property | 649 | 669 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 591 | 31 × 2231 |
| Prime factorization | 11 × 59 | 3 × 223 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 59, 649 | 1, 3, 223, 669 |
| Number of properties | 1 | 1 |
| Semiprimes | 196th | 200th |
| Roman numberals | DCXLIX | DCLXIX |
| Base 2 | 10100010012 | 10100111012 |
| Base 3 | 2200013 | 2202103 |
| Base 4 | 220214 | 221314 |
| Base 5 | 100445 | 101345 |
| Base 6 | 30016 | 30336 |
| Base 7 | 16157 | 16447 |
| Base 8 | 12118 | 12358 |
| Base 9 | 8019 | 8239 |
| Base 10 | 64910 | 66910 |
| Base 11 | 54011 | 55911 |
| Base 12 | 46112 | 47912 |
| Base 13 | 3ac13 | 3c613 |
| Base 14 | 34514 | 35b14 |
| Base 15 | 2d415 | 2e915 |
| Base 16 | 28916 | 29d16 |