Compare 640019 vs 640247
| Property | 640019 | 640247 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6400191 | 6402471 |
| Prime factorization | 640019 | 640247 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640019 | 1, 640247 |
| Number of properties | 4 | 5 |
| Additive primes | 20362nd | |
| Chen primes | 20379th | 20388th |
| Isolated primes | 40814th | |
| Primes | 52077th | 52097th |
| Safe primes | 3016th | |
| Twin primes (1st member) | 5635th | |
| Ulam primes | 3818th | |
| Roman numberals | ||
| Base 2 | 100111000100000100112 | 100111000100111101112 |
| Base 3 | 10121112211023 | 10121120202123 |
| Base 4 | 21301001034 | 21301033134 |
| Base 5 | 1304400345 | 1304414425 |
| Base 6 | 214150156 | 214200356 |
| Base 7 | 53036427 | 53044167 |
| Base 8 | 23420238 | 23423678 |
| Base 9 | 11748429 | 11752259 |
| Base 10 | 64001910 | 64024710 |
| Base 11 | 3a794611 | 3a803311 |
| Base 12 | 26a46b12 | 26a61b12 |
| Base 13 | 19541313 | 19555a13 |
| Base 14 | 12935914 | 12947d14 |
| Base 15 | c997e15 | c9a8215 |
| Base 16 | 9c41316 | 9c4f716 |