Compare 1609 vs 1620
| Property | 1609 | 1620 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 7 |
| Prime factorization | 16091 | 22 × 34 × 51 |
| Prime factorization | 1609 | 2 × 2 × 3 × 3 × 3 × 3 × 5 |
| Divisors count | 2 | 30 |
| Divisors | 1, 1609 | 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620 |
| Number of properties | 6 | 0 |
| Cousin primes (1st member) | 58th | |
| Harmonic primes | 87th | |
| Primes | 254th | |
| Prime triplets (2nd member) | 42nd | |
| Pythagorean primes | 121st | |
| Twin primes (2nd member) | 51st | |
| Roman numberals | MDCIX | MDCXX |
| Base 2 | 110010010012 | 110010101002 |
| Base 3 | 20121213 | 20200003 |
| Base 4 | 1210214 | 1211104 |
| Base 5 | 224145 | 224405 |
| Base 6 | 112416 | 113006 |
| Base 7 | 44567 | 45037 |
| Base 8 | 31118 | 31248 |
| Base 9 | 21779 | 22009 |
| Base 10 | 160910 | 162010 |
| Base 11 | 123311 | 124311 |
| Base 12 | b2112 | b3012 |
| Base 13 | 96a13 | 97813 |
| Base 14 | 82d14 | 83a14 |
| Base 15 | 72415 | 73015 |
| Base 16 | 64916 | 65416 |