Compare 523 vs 643
| Property | 523 | 643 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5231 | 6431 |
| Prime factorization | 523 | 643 |
| Divisors count | 2 | 2 |
| Divisors | 1, 523 | 1, 643 |
| Number of properties | 3 | 7 |
| Additive primes | 63rd | |
| Cousin primes (1st member) | 29th | |
| Left-truncatable primes | 34th | 38th |
| Lucky primes | 33rd | |
| Primes | 99th | 117th |
| Prime triplets (2nd member) | 24th | |
| Twin primes (2nd member) | 25th | 29th |
| Roman numberals | DXXIII | DCXLIII |
| Base 2 | 10000010112 | 10100000112 |
| Base 3 | 2011013 | 2122113 |
| Base 4 | 200234 | 220034 |
| Base 5 | 40435 | 100335 |
| Base 6 | 22316 | 25516 |
| Base 7 | 13457 | 16067 |
| Base 8 | 10138 | 12038 |
| Base 9 | 6419 | 7849 |
| Base 10 | 52310 | 64310 |
| Base 11 | 43611 | 53511 |
| Base 12 | 37712 | 45712 |
| Base 13 | 31313 | 3a613 |
| Base 14 | 29514 | 33d14 |
| Base 15 | 24d15 | 2cd15 |
| Base 16 | 20b16 | 28316 |