Compare 1913 vs 1923
| Property | 1913 | 1923 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 19131 | 31 × 6411 |
| Prime factorization | 1913 | 3 × 641 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1913 | 1, 3, 641, 1923 |
| Number of properties | 9 | 1 |
| Chen primes | 181st | |
| Emirps | 93rd | |
| Isolated primes | 178th | |
| Long primes | 114th | |
| Primes | 293rd | |
| Pythagorean primes | 142nd | |
| Semiprimes | 553rd | |
| Sexy primes (2nd member) | 125th | |
| Sexy prime triplets (3rd member) | 49th | |
| Super primes | 62nd | |
| Roman numberals | MCMXIII | MCMXXIII |
| Base 2 | 111011110012 | 111100000112 |
| Base 3 | 21212123 | 21220203 |
| Base 4 | 1313214 | 1320034 |
| Base 5 | 301235 | 301435 |
| Base 6 | 125056 | 125236 |
| Base 7 | 54027 | 54157 |
| Base 8 | 35718 | 36038 |
| Base 9 | 25559 | 25669 |
| Base 10 | 191310 | 192310 |
| Base 11 | 148a11 | 149911 |
| Base 12 | 113512 | 114312 |
| Base 13 | b4213 | b4c13 |
| Base 14 | 9a914 | 9b514 |
| Base 15 | 87815 | 88315 |
| Base 16 | 77916 | 78316 |