Compare 19987 vs 19997
| Property | 19987 | 19997 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 111 × 231 × 791 | 199971 |
| Prime factorization | 11 × 23 × 79 | 19997 |
| Divisors count | 8 | 2 |
| Divisors | 1, 11, 23, 79, 253, 869, 1817, 19987 | 1, 19997 |
| Number of properties | 0 | 9 |
| Chen primes | 1112th | |
| Cousin primes (2nd member) | 344th | |
| Happy primes | 377th | |
| Harmonic primes | 821st | |
| Isolated primes | 1579th | |
| Primes | 2262nd | |
| Prime triplets (3rd member) | 168th | |
| Pythagorean primes | 1125th | |
| Sexy primes (2nd member) | 693rd | |
| Roman numberals | ||
| Base 2 | 1001110000100112 | 1001110000111012 |
| Base 3 | 10001020213 | 10001021223 |
| Base 4 | 103201034 | 103201314 |
| Base 5 | 11144225 | 11144425 |
| Base 6 | 2323116 | 2323256 |
| Base 7 | 1121627 | 1122057 |
| Base 8 | 470238 | 470358 |
| Base 9 | 303679 | 303789 |
| Base 10 | 1998710 | 1999710 |
| Base 11 | 1402011 | 1402a11 |
| Base 12 | b69712 | b6a512 |
| Base 13 | 913613 | 914313 |
| Base 14 | 73d914 | 740514 |
| Base 15 | 5dc715 | 5dd215 |
| Base 16 | 4e1316 | 4e1d16 |