Compare 640009 vs 640019
| Property | 640009 | 640019 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6400091 | 6400191 |
| Prime factorization | 640009 | 640019 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640009 | 1, 640019 |
| Number of properties | 6 | 4 |
| Additive primes | 20351st | |
| Chen primes | 20378th | 20379th |
| Happy primes | 7413th | |
| Isolated primes | 40814th | |
| Lucky primes | 5978th | |
| Primes | 52076th | 52077th |
| Safe primes | 3016th | |
| Twin primes (2nd member) | 5632nd | |
| Roman numberals | ||
| Base 2 | 100111000100000010012 | 100111000100000100112 |
| Base 3 | 10121112210013 | 10121112211023 |
| Base 4 | 21301000214 | 21301001034 |
| Base 5 | 1304400145 | 1304400345 |
| Base 6 | 214150016 | 214150156 |
| Base 7 | 53036267 | 53036427 |
| Base 8 | 23420118 | 23420238 |
| Base 9 | 11748319 | 11748429 |
| Base 10 | 64000910 | 64001910 |
| Base 11 | 3a793711 | 3a794611 |
| Base 12 | 26a46112 | 26a46b12 |
| Base 13 | 19540613 | 19541313 |
| Base 14 | 12934d14 | 12935914 |
| Base 15 | c997415 | c997e15 |
| Base 16 | 9c40916 | 9c41316 |