Compare 1861 vs 1949
| Property | 1861 | 1949 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18611 | 19491 |
| Prime factorization | 1861 | 1949 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1861 | 1, 1949 |
| Number of properties | 10 | 8 |
| Additive primes | 156th | |
| Centered square primes | 15th | |
| Chen primes | 183rd | |
| Emirps | 95th | |
| Good primes | 58th | |
| Harmonic primes | 103rd | 110th |
| Isolated primes | 173rd | |
| Long primes | 112th | 115th |
| Primes | 284th | 296th |
| Pythagorean primes | 137th | 144th |
| Sexy primes (1st member) | 120th | |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Twin primes (1st member) | 60th | |
| Roman numberals | MDCCCLXI | MCMXLIX |
| Base 2 | 111010001012 | 111100111012 |
| Base 3 | 21122213 | 22000123 |
| Base 4 | 1310114 | 1321314 |
| Base 5 | 244215 | 302445 |
| Base 6 | 123416 | 130056 |
| Base 7 | 52667 | 54537 |
| Base 8 | 35058 | 36358 |
| Base 9 | 24879 | 26059 |
| Base 10 | 186110 | 194910 |
| Base 11 | 144211 | 151211 |
| Base 12 | 10b112 | 116512 |
| Base 13 | b0213 | b6c13 |
| Base 14 | 96d14 | 9d314 |
| Base 15 | 84115 | 89e15 |
| Base 16 | 74516 | 79d16 |