Compare 1606 vs 1609
| Property | 1606 | 1609 | 
|---|---|---|
| Type | composite number | prime | 
| Unique factors | 3 | 1 | 
| Total factors | 3 | 1 | 
| Prime factorization | 21 × 111 × 731 | 16091 | 
| Prime factorization | 2 × 11 × 73 | 1609 | 
| Divisors count | 8 | 2 | 
| Divisors | 1, 2, 11, 22, 73, 146, 803, 1606 | 1, 1609 | 
| Number of properties | 0 | 6 | 
| 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 | MDCVI | MDCIX | 
| Base 2 | 110010001102 | 110010010012 | 
| Base 3 | 20121113 | 20121213 | 
| Base 4 | 1210124 | 1210214 | 
| Base 5 | 224115 | 224145 | 
| Base 6 | 112346 | 112416 | 
| Base 7 | 44537 | 44567 | 
| Base 8 | 31068 | 31118 | 
| Base 9 | 21749 | 21779 | 
| Base 10 | 160610 | 160910 | 
| Base 11 | 123011 | 123311 | 
| Base 12 | b1a12 | b2112 | 
| Base 13 | 96713 | 96a13 | 
| Base 14 | 82a14 | 82d14 | 
| Base 15 | 72115 | 72415 | 
| Base 16 | 64616 | 64916 |