Compare 1861 vs 1907
| Property | 1861 | 1907 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18611 | 19071 |
| Prime factorization | 1861 | 1907 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1861 | 1, 1907 |
| Number of properties | 10 | 9 |
| Additive primes | 155th | |
| Centered square primes | 15th | |
| Chen primes | 180th | |
| Good primes | 58th | |
| Harmonic primes | 103rd | 107th |
| Isolated primes | 173rd | 177th |
| Long primes | 112th | |
| Primes | 284th | 292nd |
| Pythagorean primes | 137th | |
| Safe primes | 37th | |
| Sexy primes (1st member) | 120th | 125th |
| Sexy primes (2nd member) | 124th | |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Sexy prime triplets (2nd member) | 49th | |
| Roman numberals | MDCCCLXI | MCMVII |
| Base 2 | 111010001012 | 111011100112 |
| Base 3 | 21122213 | 21211223 |
| Base 4 | 1310114 | 1313034 |
| Base 5 | 244215 | 301125 |
| Base 6 | 123416 | 124556 |
| Base 7 | 52667 | 53637 |
| Base 8 | 35058 | 35638 |
| Base 9 | 24879 | 25489 |
| Base 10 | 186110 | 190710 |
| Base 11 | 144211 | 148411 |
| Base 12 | 10b112 | 112b12 |
| Base 13 | b0213 | b3913 |
| Base 14 | 96d14 | 9a314 |
| Base 15 | 84115 | 87215 |
| Base 16 | 74516 | 77316 |