Compare 1923 vs 1931
| Property | 1923 | 1931 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 6411 | 19311 |
| Prime factorization | 3 × 641 | 1931 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 641, 1923 | 1, 1931 |
| Number of properties | 1 | 5 |
| Chen primes | 182nd | |
| Harmonic primes | 108th | |
| Primes | 294th | |
| Semiprimes | 553rd | |
| Sophie germain primes | 59th | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MCMXXIII | MCMXXXI |
| Base 2 | 111100000112 | 111100010112 |
| Base 3 | 21220203 | 21221123 |
| Base 4 | 1320034 | 1320234 |
| Base 5 | 301435 | 302115 |
| Base 6 | 125236 | 125356 |
| Base 7 | 54157 | 54267 |
| Base 8 | 36038 | 36138 |
| Base 9 | 25669 | 25759 |
| Base 10 | 192310 | 193110 |
| Base 11 | 149911 | 14a611 |
| Base 12 | 114312 | 114b12 |
| Base 13 | b4c13 | b5713 |
| Base 14 | 9b514 | 9bd14 |
| Base 15 | 88315 | 88b15 |
| Base 16 | 78316 | 78b16 |