Compare 401 vs 403
| Property | 401 | 403 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 4011 | 131 × 311 |
| Prime factorization | 401 | 13 × 31 |
| Divisors count | 2 | 4 |
| Divisors | 1, 401 | 1, 13, 31, 403 |
| Number of properties | 7 | 1 |
| Additive primes | 46th | |
| Chen primes | 56th | |
| Cousin primes (2nd member) | 22nd | |
| Isolated primes | 38th | |
| Primes | 79th | |
| Pythagorean primes | 38th | |
| Semiprimes | 127th | |
| Super primes | 22nd | |
| Roman numberals | CDI | CDIII |
| Base 2 | 1100100012 | 1100100112 |
| Base 3 | 1122123 | 1122213 |
| Base 4 | 121014 | 121034 |
| Base 5 | 31015 | 31035 |
| Base 6 | 15056 | 15116 |
| Base 7 | 11127 | 11147 |
| Base 8 | 6218 | 6238 |
| Base 9 | 4859 | 4879 |
| Base 10 | 40110 | 40310 |
| Base 11 | 33511 | 33711 |
| Base 12 | 29512 | 29712 |
| Base 13 | 24b13 | 25013 |
| Base 14 | 20914 | 20b14 |
| Base 15 | 1bb15 | 1bd15 |
| Base 16 | 19116 | 19316 |