Compare 635 vs 643
| Property | 635 | 643 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 1271 | 6431 |
| Prime factorization | 5 × 127 | 643 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 127, 635 | 1, 643 |
| Number of properties | 1 | 7 |
| Additive primes | 63rd | |
| Cousin primes (1st member) | 29th | |
| Left-truncatable primes | 38th | |
| Lucky primes | 33rd | |
| Primes | 117th | |
| Prime triplets (2nd member) | 24th | |
| Semiprimes | 195th | |
| Twin primes (2nd member) | 29th | |
| Roman numberals | DCXXXV | DCXLIII |
| Base 2 | 10011110112 | 10100000112 |
| Base 3 | 2121123 | 2122113 |
| Base 4 | 213234 | 220034 |
| Base 5 | 100205 | 100335 |
| Base 6 | 25356 | 25516 |
| Base 7 | 15657 | 16067 |
| Base 8 | 11738 | 12038 |
| Base 9 | 7759 | 7849 |
| Base 10 | 63510 | 64310 |
| Base 11 | 52811 | 53511 |
| Base 12 | 44b12 | 45712 |
| Base 13 | 39b13 | 3a613 |
| Base 14 | 33514 | 33d14 |
| Base 15 | 2c515 | 2cd15 |
| Base 16 | 27b16 | 28316 |