Compare 1397 vs 1399
| Property | 1397 | 1399 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 1271 | 13991 |
| Prime factorization | 11 × 127 | 1399 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 127, 1397 | 1, 1399 |
| Number of properties | 1 | 6 |
| Chen primes | 145th | |
| Emirps | 65th | |
| Good primes | 52nd | |
| Harmonic primes | 76th | |
| Isolated primes | 131st | |
| Primes | 222nd | |
| Semiprimes | 414th | |
| Roman numberals | MCCCXCVII | MCCCXCIX |
| Base 2 | 101011101012 | 101011101112 |
| Base 3 | 12202023 | 12202113 |
| Base 4 | 1113114 | 1113134 |
| Base 5 | 210425 | 210445 |
| Base 6 | 102456 | 102516 |
| Base 7 | 40347 | 40367 |
| Base 8 | 25658 | 25678 |
| Base 9 | 18229 | 18249 |
| Base 10 | 139710 | 139910 |
| Base 11 | 106011 | 106211 |
| Base 12 | 98512 | 98712 |
| Base 13 | 83613 | 83813 |
| Base 14 | 71b14 | 71d14 |
| Base 15 | 63215 | 63415 |
| Base 16 | 57516 | 57716 |