Compare 1809 vs 1819
| Property | 1809 | 1819 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 33 × 671 | 171 × 1071 |
| Prime factorization | 3 × 3 × 3 × 67 | 17 × 107 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 9, 27, 67, 201, 603, 1809 | 1, 17, 107, 1819 |
| Number of properties | 0 | 1 |
| Semiprimes | 523rd | |
| Roman numberals | MDCCCIX | MDCCCXIX |
| Base 2 | 111000100012 | 111000110112 |
| Base 3 | 21110003 | 21111013 |
| Base 4 | 1301014 | 1301234 |
| Base 5 | 242145 | 242345 |
| Base 6 | 122136 | 122316 |
| Base 7 | 51637 | 52067 |
| Base 8 | 34218 | 34338 |
| Base 9 | 24309 | 24419 |
| Base 10 | 180910 | 181910 |
| Base 11 | 13a511 | 140411 |
| Base 12 | 106912 | 107712 |
| Base 13 | a9213 | a9c13 |
| Base 14 | 93314 | 93d14 |
| Base 15 | 80915 | 81415 |
| Base 16 | 71116 | 71b16 |