Compare 209987 vs 209998
| Property | 209987 | 209998 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 2099871 | 21 × 1049991 |
| Prime factorization | 209987 | 2 × 104999 |
| Divisors count | 2 | 4 |
| Divisors | 1, 209987 | 1, 2, 104999, 209998 |
| Number of properties | 4 | 1 |
| Cousin primes (2nd member) | 2225th | |
| Harmonic primes | 7041st | |
| Isolated primes | 14302nd | |
| Primes | 18807th | |
| Semiprimes | 47360th | |
| Roman numberals | ||
| Base 2 | 1100110100010000112 | 1100110100010011102 |
| Base 3 | 1012000010223 | 1012000012013 |
| Base 4 | 3031010034 | 3031010324 |
| Base 5 | 232044225 | 232044435 |
| Base 6 | 43000556 | 43001146 |
| Base 7 | 15331317 | 15331457 |
| Base 8 | 6321038 | 6321168 |
| Base 9 | 3500389 | 3500519 |
| Base 10 | 20998710 | 20999810 |
| Base 11 | 13384811 | 13385811 |
| Base 12 | a162b12 | a163a12 |
| Base 13 | 7476b13 | 7477913 |
| Base 14 | 5675114 | 5675c14 |
| Base 15 | 4234215 | 4234d15 |
| Base 16 | 3344316 | 3344e16 |