Compare 1390 vs 1399
| Property | 1390 | 1399 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 51 × 1391 | 13991 |
| Prime factorization | 2 × 5 × 139 | 1399 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 5, 10, 139, 278, 695, 1390 | 1, 1399 |
| Number of properties | 0 | 6 |
| Chen primes | 145th | |
| Emirps | 65th | |
| Good primes | 52nd | |
| Harmonic primes | 76th | |
| Isolated primes | 131st | |
| Primes | 222nd | |
| Roman numberals | MCCCXC | MCCCXCIX |
| Base 2 | 101011011102 | 101011101112 |
| Base 3 | 12201113 | 12202113 |
| Base 4 | 1112324 | 1113134 |
| Base 5 | 210305 | 210445 |
| Base 6 | 102346 | 102516 |
| Base 7 | 40247 | 40367 |
| Base 8 | 25568 | 25678 |
| Base 9 | 18149 | 18249 |
| Base 10 | 139010 | 139910 |
| Base 11 | 105411 | 106211 |
| Base 12 | 97a12 | 98712 |
| Base 13 | 82c13 | 83813 |
| Base 14 | 71414 | 71d14 |
| Base 15 | 62a15 | 63415 |
| Base 16 | 56e16 | 57716 |