Compare 401 vs 491
| Property | 401 | 491 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 4011 | 4911 |
| Prime factorization | 401 | 491 |
| Divisors count | 2 | 2 |
| Divisors | 1, 401 | 1, 491 |
| Number of properties | 7 | 7 |
| Additive primes | 46th | |
| Chen primes | 56th | 66th |
| Cousin primes (2nd member) | 22nd | 26th |
| Harmonic primes | 38th | |
| Isolated primes | 38th | 47th |
| Long primes | 34th | |
| Primes | 79th | 94th |
| Pythagorean primes | 38th | |
| Sophie germain primes | 25th | |
| Super primes | 22nd | |
| Roman numberals | CDI | CDXCI |
| Base 2 | 1100100012 | 1111010112 |
| Base 3 | 1122123 | 2000123 |
| Base 4 | 121014 | 132234 |
| Base 5 | 31015 | 34315 |
| Base 6 | 15056 | 21356 |
| Base 7 | 11127 | 13017 |
| Base 8 | 6218 | 7538 |
| Base 9 | 4859 | 6059 |
| Base 10 | 40110 | 49110 |
| Base 11 | 33511 | 40711 |
| Base 12 | 29512 | 34b12 |
| Base 13 | 24b13 | 2ba13 |
| Base 14 | 20914 | 27114 |
| Base 15 | 1bb15 | 22b15 |
| Base 16 | 19116 | 1eb16 |