Compare 648 vs 649
| Property | 648 | 649 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 7 | 2 |
| Prime factorization | 23 × 34 | 111 × 591 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 3 × 3 | 11 × 59 |
| Divisors count | 20 | 4 |
| Divisors | 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648 | 1, 11, 59, 649 |
| Number of properties | 0 | 1 |
| Semiprimes | 196th | |
| Roman numberals | DCXLVIII | DCXLIX |
| Base 2 | 10100010002 | 10100010012 |
| Base 3 | 2200003 | 2200013 |
| Base 4 | 220204 | 220214 |
| Base 5 | 100435 | 100445 |
| Base 6 | 30006 | 30016 |
| Base 7 | 16147 | 16157 |
| Base 8 | 12108 | 12118 |
| Base 9 | 8009 | 8019 |
| Base 10 | 64810 | 64910 |
| Base 11 | 53a11 | 54011 |
| Base 12 | 46012 | 46112 |
| Base 13 | 3ab13 | 3ac13 |
| Base 14 | 34414 | 34514 |
| Base 15 | 2d315 | 2d415 |
| Base 16 | 28816 | 28916 |