Compare 19979 vs 19990
| Property | 19979 | 19990 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 199791 | 21 × 51 × 19991 |
| Prime factorization | 19979 | 2 × 5 × 1999 |
| Divisors count | 2 | 8 |
| Divisors | 1, 19979 | 1, 2, 5, 10, 1999, 3998, 9995, 19990 |
| Number of properties | 6 | 0 |
| Happy primes | 376th | |
| Harmonic primes | 819th | |
| Isolated primes | 1578th | |
| Long primes | 864th | |
| Primes | 2259th | |
| Sexy primes (2nd member) | 692nd | |
| Roman numberals | ||
| Base 2 | 1001110000010112 | 1001110000101102 |
| Base 3 | 10001012223 | 10001021013 |
| Base 4 | 103200234 | 103201124 |
| Base 5 | 11144045 | 11144305 |
| Base 6 | 2322556 | 2323146 |
| Base 7 | 1121517 | 1121657 |
| Base 8 | 470138 | 470268 |
| Base 9 | 303589 | 303719 |
| Base 10 | 1997910 | 1999010 |
| Base 11 | 1401311 | 1402311 |
| Base 12 | b68b12 | b69a12 |
| Base 13 | 912b13 | 913913 |
| Base 14 | 73d114 | 73dc14 |
| Base 15 | 5dbe15 | 5dca15 |
| Base 16 | 4e0b16 | 4e1616 |