Compare 1913 vs 1918
| Property | 1913 | 1918 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 19131 | 21 × 71 × 1371 |
| Prime factorization | 1913 | 2 × 7 × 137 |
| Divisors count | 2 | 8 |
| Divisors | 1, 1913 | 1, 2, 7, 14, 137, 274, 959, 1918 |
| Number of properties | 9 | 0 |
| Chen primes | 181st | |
| Emirps | 93rd | |
| Isolated primes | 178th | |
| Long primes | 114th | |
| Primes | 293rd | |
| Pythagorean primes | 142nd | |
| Sexy primes (2nd member) | 125th | |
| Sexy prime triplets (3rd member) | 49th | |
| Super primes | 62nd | |
| Roman numberals | MCMXIII | MCMXVIII |
| Base 2 | 111011110012 | 111011111102 |
| Base 3 | 21212123 | 21220013 |
| Base 4 | 1313214 | 1313324 |
| Base 5 | 301235 | 301335 |
| Base 6 | 125056 | 125146 |
| Base 7 | 54027 | 54107 |
| Base 8 | 35718 | 35768 |
| Base 9 | 25559 | 25619 |
| Base 10 | 191310 | 191810 |
| Base 11 | 148a11 | 149411 |
| Base 12 | 113512 | 113a12 |
| Base 13 | b4213 | b4713 |
| Base 14 | 9a914 | 9b014 |
| Base 15 | 87815 | 87d15 |
| Base 16 | 77916 | 77e16 |