Compare 1801 vs 1931
| Property | 1801 | 1931 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18011 | 19311 |
| Prime factorization | 1801 | 1931 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1801 | 1, 1931 |
| Number of properties | 7 | 5 |
| Chen primes | 174th | 182nd |
| Cuban primes 1 | 13th | |
| Harmonic primes | 99th | 108th |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 279th | 294th |
| Pythagorean primes | 136th | |
| Sophie germain primes | 59th | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MDCCCI | MCMXXXI |
| Base 2 | 111000010012 | 111100010112 |
| Base 3 | 21102013 | 21221123 |
| Base 4 | 1300214 | 1320234 |
| Base 5 | 242015 | 302115 |
| Base 6 | 122016 | 125356 |
| Base 7 | 51527 | 54267 |
| Base 8 | 34118 | 36138 |
| Base 9 | 24219 | 25759 |
| Base 10 | 180110 | 193110 |
| Base 11 | 139811 | 14a611 |
| Base 12 | 106112 | 114b12 |
| Base 13 | a8713 | b5713 |
| Base 14 | 92914 | 9bd14 |
| Base 15 | 80115 | 88b15 |
| Base 16 | 70916 | 78b16 |