Compare 661139 vs 661721
| Property | 661139 | 661721 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6611391 | 6617211 |
| Prime factorization | 661139 | 661721 |
| Divisors count | 2 | 2 |
| Divisors | 1, 661139 | 1, 661721 |
| Number of properties | 4 | 4 |
| Additive primes | 20964th | |
| Chen primes | 20993rd | 21003rd |
| Isolated primes | 42080th | 42113th |
| Primes | 53661st | 53698th |
| Safe primes | 3099th | |
| Roman numberals | ||
| Base 2 | 101000010110100100112 | 101000011000110110012 |
| Base 3 | 10201202201223 | 10201212010123 |
| Base 4 | 22011221034 | 22012031214 |
| Base 5 | 1321240245 | 1321333415 |
| Base 6 | 221004556 | 221033056 |
| Base 7 | 54223437 | 54241347 |
| Base 8 | 24132238 | 24143318 |
| Base 9 | 12168189 | 12176359 |
| Base 10 | 66113910 | 66172110 |
| Base 11 | 4117a611 | 41218511 |
| Base 12 | 27a72b12 | 27ab3512 |
| Base 13 | 1a1c0b13 | 1a226813 |
| Base 14 | 132d2314 | 13321b14 |
| Base 15 | d0d5e15 | d10eb15 |
| Base 16 | a169316 | a18d916 |