Compare 1669 vs 1678
| Property | 1669 | 1678 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 16691 | 21 × 8391 |
| Prime factorization | 1669 | 2 × 839 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1669 | 1, 2, 839, 1678 |
| Number of properties | 9 | 1 |
| Chen primes | 166th | |
| Emirps | 81st | |
| Primes | 263rd | |
| Prime triplets (3rd member) | 43rd | |
| Pythagorean primes | 126th | |
| Semiprimes | 482nd | |
| Sexy primes (2nd member) | 113th | |
| Sexy prime triplets (3rd member) | 43rd | |
| Super primes | 56th | |
| Twin primes (2nd member) | 53rd | |
| Roman numberals | MDCLXIX | MDCLXXVIII |
| Base 2 | 110100001012 | 110100011102 |
| Base 3 | 20212113 | 20220113 |
| Base 4 | 1220114 | 1220324 |
| Base 5 | 231345 | 232035 |
| Base 6 | 114216 | 114346 |
| Base 7 | 46037 | 46157 |
| Base 8 | 32058 | 32168 |
| Base 9 | 22549 | 22649 |
| Base 10 | 166910 | 167810 |
| Base 11 | 128811 | 129611 |
| Base 12 | b7112 | b7a12 |
| Base 13 | 9b513 | 9c113 |
| Base 14 | 87314 | 87c14 |
| Base 15 | 76415 | 76d15 |
| Base 16 | 68516 | 68e16 |