Compare 643 vs 823
| Property | 643 | 823 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6431 | 8231 |
| Prime factorization | 643 | 823 |
| Divisors count | 2 | 2 |
| Divisors | 1, 643 | 1, 823 |
| Number of properties | 7 | 11 |
| Additive primes | 63rd | 76th |
| Cousin primes (1st member) | 29th | 34th |
| Left-truncatable primes | 38th | 46th |
| Long primes | 51st | |
| Lucky primes | 33rd | 39th |
| Primes | 117th | 143rd |
| Prime quadruplets (2nd member) | 5th | |
| Prime triplets (1st member) | 26th | |
| Prime triplets (2nd member) | 24th | 25th |
| Sexy primes (1st member) | 65th | |
| Twin primes (2nd member) | 29th | 32nd |
| Roman numberals | DCXLIII | DCCCXXIII |
| Base 2 | 10100000112 | 11001101112 |
| Base 3 | 2122113 | 10101113 |
| Base 4 | 220034 | 303134 |
| Base 5 | 100335 | 112435 |
| Base 6 | 25516 | 34516 |
| Base 7 | 16067 | 22547 |
| Base 8 | 12038 | 14678 |
| Base 9 | 7849 | 11149 |
| Base 10 | 64310 | 82310 |
| Base 11 | 53511 | 68911 |
| Base 12 | 45712 | 58712 |
| Base 13 | 3a613 | 4b413 |
| Base 14 | 33d14 | 42b14 |
| Base 15 | 2cd15 | 39d15 |
| Base 16 | 28316 | 33716 |