Compare 1913 vs 1931
| Property | 1913 | 1931 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19131 | 19311 |
| Prime factorization | 1913 | 1931 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1913 | 1, 1931 |
| Number of properties | 9 | 5 |
| Chen primes | 181st | 182nd |
| Emirps | 93rd | |
| Harmonic primes | 108th | |
| Isolated primes | 178th | |
| Long primes | 114th | |
| Primes | 293rd | 294th |
| Pythagorean primes | 142nd | |
| Sexy primes (2nd member) | 125th | |
| Sexy prime triplets (3rd member) | 49th | |
| Sophie germain primes | 59th | |
| Super primes | 62nd | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MCMXIII | MCMXXXI |
| Base 2 | 111011110012 | 111100010112 |
| Base 3 | 21212123 | 21221123 |
| Base 4 | 1313214 | 1320234 |
| Base 5 | 301235 | 302115 |
| Base 6 | 125056 | 125356 |
| Base 7 | 54027 | 54267 |
| Base 8 | 35718 | 36138 |
| Base 9 | 25559 | 25759 |
| Base 10 | 191310 | 193110 |
| Base 11 | 148a11 | 14a611 |
| Base 12 | 113512 | 114b12 |
| Base 13 | b4213 | b5713 |
| Base 14 | 9a914 | 9bd14 |
| Base 15 | 87815 | 88b15 |
| Base 16 | 77916 | 78b16 |