Compare 399 vs 401
| Property | 399 | 401 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 71 × 191 | 4011 |
| Prime factorization | 3 × 7 × 19 | 401 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 7, 19, 21, 57, 133, 399 | 1, 401 |
| Number of properties | 0 | 7 |
| Additive primes | 46th | |
| Chen primes | 56th | |
| Cousin primes (2nd member) | 22nd | |
| Isolated primes | 38th | |
| Primes | 79th | |
| Pythagorean primes | 38th | |
| Super primes | 22nd | |
| Roman numberals | CCCXCIX | CDI |
| Base 2 | 1100011112 | 1100100012 |
| Base 3 | 1122103 | 1122123 |
| Base 4 | 120334 | 121014 |
| Base 5 | 30445 | 31015 |
| Base 6 | 15036 | 15056 |
| Base 7 | 11107 | 11127 |
| Base 8 | 6178 | 6218 |
| Base 9 | 4839 | 4859 |
| Base 10 | 39910 | 40110 |
| Base 11 | 33311 | 33511 |
| Base 12 | 29312 | 29512 |
| Base 13 | 24913 | 24b13 |
| Base 14 | 20714 | 20914 |
| Base 15 | 1b915 | 1bb15 |
| Base 16 | 18f16 | 19116 |