Compare 636 vs 643
| Property | 636 | 643 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 31 × 531 | 6431 |
| Prime factorization | 2 × 2 × 3 × 53 | 643 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 3, 4, 6, 12, 53, 106, 159, 212, 318, 636 | 1, 643 |
| Number of properties | 0 | 7 |
| Additive primes | 63rd | |
| Cousin primes (1st member) | 29th | |
| Left-truncatable primes | 38th | |
| Lucky primes | 33rd | |
| Primes | 117th | |
| Prime triplets (2nd member) | 24th | |
| Twin primes (2nd member) | 29th | |
| Roman numberals | DCXXXVI | DCXLIII |
| Base 2 | 10011111002 | 10100000112 |
| Base 3 | 2121203 | 2122113 |
| Base 4 | 213304 | 220034 |
| Base 5 | 100215 | 100335 |
| Base 6 | 25406 | 25516 |
| Base 7 | 15667 | 16067 |
| Base 8 | 11748 | 12038 |
| Base 9 | 7769 | 7849 |
| Base 10 | 63610 | 64310 |
| Base 11 | 52911 | 53511 |
| Base 12 | 45012 | 45712 |
| Base 13 | 39c13 | 3a613 |
| Base 14 | 33614 | 33d14 |
| Base 15 | 2c615 | 2cd15 |
| Base 16 | 27c16 | 28316 |