Compare 9 vs 53
| Property | 9 | 53 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 1 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 32 | 531 |
| Prime factorization | 3 × 3 | 53 |
| Divisors count | 3 | 2 |
| Divisors | 1, 3, 9 | 1, 53 |
| Number of properties | 1 | 18 |
| Chen primes | 15th | |
| Class 1+ primes | 10th | |
| Good primes | 7th | |
| Isolated primes | 5th | |
| Left-truncatable primes | 11th | |
| Pierpont primes of the 2nd kind | 10th | |
| Primes | 16th | |
| Pythagorean primes | 7th | |
| Restricted right-truncatable primes | 1st | |
| Right-truncatable primes | 9th | |
| Semiprimes | 3rd | |
| Sexy primes (1st member) | 11th | |
| Sexy primes (2nd member) | 10th | |
| Sexy prime quadrupletss (3rd member) | 3rd | |
| Sexy prime triplets (2nd member) | 7th | |
| Sexy prime triplets (3rd member) | 6th | |
| Sophie germain primes | 8th | |
| Two-sided primes | 7th | |
| Ulam primes | 6th | |
| Roman numberals | IX | LIII |
| Base 2 | 10012 | 1101012 |
| Base 3 | 1003 | 12223 |
| Base 4 | 214 | 3114 |
| Base 5 | 145 | 2035 |
| Base 6 | 136 | 1256 |
| Base 7 | 127 | 1047 |
| Base 8 | 118 | 658 |
| Base 9 | 109 | 589 |
| Base 10 | 910 | 5310 |
| Base 11 | 911 | 4911 |
| Base 12 | 912 | 4512 |
| Base 13 | 913 | 4113 |
| Base 14 | 914 | 3b14 |
| Base 15 | 915 | 3815 |
| Base 16 | 916 | 3516 |