Compare 1861 vs 1973
| Property | 1861 | 1973 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18611 | 19731 |
| Prime factorization | 1861 | 1973 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1861 | 1, 1973 |
| Number of properties | 10 | 7 |
| Centered square primes | 15th | |
| Good primes | 58th | 61st |
| Harmonic primes | 103rd | 111th |
| Isolated primes | 173rd | 179th |
| Long primes | 112th | |
| Primes | 284th | 298th |
| Pythagorean primes | 137th | 145th |
| Sexy primes (1st member) | 120th | 126th |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Sophie germain primes | 60th | |
| Roman numberals | MDCCCLXI | MCMLXXIII |
| Base 2 | 111010001012 | 111101101012 |
| Base 3 | 21122213 | 22010023 |
| Base 4 | 1310114 | 1323114 |
| Base 5 | 244215 | 303435 |
| Base 6 | 123416 | 130456 |
| Base 7 | 52667 | 55167 |
| Base 8 | 35058 | 36658 |
| Base 9 | 24879 | 26329 |
| Base 10 | 186110 | 197310 |
| Base 11 | 144211 | 153411 |
| Base 12 | 10b112 | 118512 |
| Base 13 | b0213 | b8a13 |
| Base 14 | 96d14 | a0d14 |
| Base 15 | 84115 | 8b815 |
| Base 16 | 74516 | 7b516 |