Compare 649 vs 659
| Property | 649 | 659 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 591 | 6591 |
| Prime factorization | 11 × 59 | 659 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 59, 649 | 1, 659 |
| Number of properties | 1 | 8 |
| Chen primes | 84th | |
| Long primes | 44th | |
| Primes | 120th | |
| Semiprimes | 196th | |
| Sexy primes (2nd member) | 59th | |
| Sexy prime quadrupletss (4th member) | 7th | |
| Sexy prime triplets (3rd member) | 25th | |
| Sophie germain primes | 30th | |
| Twin primes (1st member) | 30th | |
| Roman numberals | DCXLIX | DCLIX |
| Base 2 | 10100010012 | 10100100112 |
| Base 3 | 2200013 | 2201023 |
| Base 4 | 220214 | 221034 |
| Base 5 | 100445 | 101145 |
| Base 6 | 30016 | 30156 |
| Base 7 | 16157 | 16317 |
| Base 8 | 12118 | 12238 |
| Base 9 | 8019 | 8129 |
| Base 10 | 64910 | 65910 |
| Base 11 | 54011 | 54a11 |
| Base 12 | 46112 | 46b12 |
| Base 13 | 3ac13 | 3b913 |
| Base 14 | 34514 | 35114 |
| Base 15 | 2d415 | 2de15 |
| Base 16 | 28916 | 29316 |