Compare 1940 vs 1949
| Property | 1940 | 1949 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 51 × 971 | 19491 |
| Prime factorization | 2 × 2 × 5 × 97 | 1949 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940 | 1, 1949 |
| Number of properties | 0 | 8 |
| Additive primes | 156th | |
| Chen primes | 183rd | |
| Emirps | 95th | |
| Harmonic primes | 110th | |
| Long primes | 115th | |
| Primes | 296th | |
| Pythagorean primes | 144th | |
| Twin primes (1st member) | 60th | |
| Roman numberals | MCMXL | MCMXLIX |
| Base 2 | 111100101002 | 111100111012 |
| Base 3 | 21222123 | 22000123 |
| Base 4 | 1321104 | 1321314 |
| Base 5 | 302305 | 302445 |
| Base 6 | 125526 | 130056 |
| Base 7 | 54417 | 54537 |
| Base 8 | 36248 | 36358 |
| Base 9 | 25859 | 26059 |
| Base 10 | 194010 | 194910 |
| Base 11 | 150411 | 151211 |
| Base 12 | 115812 | 116512 |
| Base 13 | b6313 | b6c13 |
| Base 14 | 9c814 | 9d314 |
| Base 15 | 89515 | 89e15 |
| Base 16 | 79416 | 79d16 |