Compare 123 vs 131
| Property | 123 | 131 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 411 | 1311 |
| Prime factorization | 3 × 41 | 131 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 41, 123 | 1, 131 |
| Number of properties | 1 | 12 |
| Additive primes | 17th | |
| Chen primes | 26th | |
| Cousin primes (2nd member) | 12th | |
| Isolated primes | 13th | |
| Long primes | 12th | |
| Multiplicative primes | 10th | |
| Palindromic primes | 7th | |
| Primes | 32nd | |
| Semiprimes | 42nd | |
| Sexy primes (1st member) | 20th | |
| Solinas primes | 23rd | |
| Sophie germain primes | 12th | |
| Ulam primes | 8th | |
| Roman numberals | CXXIII | CXXXI |
| Base 2 | 11110112 | 100000112 |
| Base 3 | 111203 | 112123 |
| Base 4 | 13234 | 20034 |
| Base 5 | 4435 | 10115 |
| Base 6 | 3236 | 3356 |
| Base 7 | 2347 | 2457 |
| Base 8 | 1738 | 2038 |
| Base 9 | 1469 | 1559 |
| Base 10 | 12310 | 13110 |
| Base 11 | 10211 | 10a11 |
| Base 12 | a312 | ab12 |
| Base 13 | 9613 | a113 |
| Base 14 | 8b14 | 9514 |
| Base 15 | 8315 | 8b15 |
| Base 16 | 7b16 | 8316 |