Compare 1811 vs 1901
| Property | 1811 | 1901 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18111 | 19011 |
| Prime factorization | 1811 | 1901 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1811 | 1, 1901 |
| Number of properties | 8 | 11 |
| Additive primes | 149th | 154th |
| Centered decagonal primes | 14th | |
| Chen primes | 179th | |
| Dihedral primes | 7th | |
| Emirps | 87th | 92nd |
| Harmonic primes | 100th | 106th |
| Isolated primes | 169th | 176th |
| Long primes | 109th | |
| Primes | 280th | 291st |
| Pythagorean primes | 141st | |
| Sexy primes (1st member) | 124th | |
| Sexy prime triplets (1st member) | 49th | |
| Sophie germain primes | 56th | 58th |
| Roman numberals | MDCCCXI | MCMI |
| Base 2 | 111000100112 | 111011011012 |
| Base 3 | 21110023 | 21211023 |
| Base 4 | 1301034 | 1312314 |
| Base 5 | 242215 | 301015 |
| Base 6 | 122156 | 124456 |
| Base 7 | 51657 | 53547 |
| Base 8 | 34238 | 35558 |
| Base 9 | 24329 | 25429 |
| Base 10 | 181110 | 190110 |
| Base 11 | 13a711 | 147911 |
| Base 12 | 106b12 | 112512 |
| Base 13 | a9413 | b3313 |
| Base 14 | 93514 | 99b14 |
| Base 15 | 80b15 | 86b15 |
| Base 16 | 71316 | 76d16 |