Compare 19887 vs 19889
| Property | 19887 | 19889 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 71 × 9471 | 198891 |
| Prime factorization | 3 × 7 × 947 | 19889 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 7, 21, 947, 2841, 6629, 19887 | 1, 19889 |
| Number of properties | 0 | 8 |
| Chen primes | 1106th | |
| Good primes | 255th | |
| Happy primes | 374th | |
| Harmonic primes | 814th | |
| Primes | 2249th | |
| Pythagorean primes | 1118th | |
| Sophie germain primes | 323rd | |
| Twin primes (1st member) | 340th | |
| Roman numberals | ||
| Base 2 | 1001101101011112 | 1001101101100012 |
| Base 3 | 10000211203 | 10000211223 |
| Base 4 | 103122334 | 103123014 |
| Base 5 | 11140225 | 11140245 |
| Base 6 | 2320236 | 2320256 |
| Base 7 | 1116607 | 1116627 |
| Base 8 | 466578 | 466618 |
| Base 9 | 302469 | 302489 |
| Base 10 | 1988710 | 1988910 |
| Base 11 | 13a3a11 | 13a4111 |
| Base 12 | b61312 | b61512 |
| Base 13 | 908a13 | 908c13 |
| Base 14 | 736714 | 736914 |
| Base 15 | 5d5c15 | 5d5e15 |
| Base 16 | 4daf16 | 4db116 |