| Base | Representation |
|---|---|
| bin | 1010001110011… |
| … | …0101011010011 |
| 3 | 2222200221010102 |
| 4 | 2203212223103 |
| 5 | 41434403031 |
| 6 | 4131123015 |
| 7 | 1030353404 |
| oct | 243465323 |
| 9 | 88627112 |
| 10 | 42887891 |
| 11 | 22233342 |
| 12 | 1244346b |
| 13 | 8b68167 |
| 14 | 59a59ab |
| 15 | 3b727cb |
| hex | 28e6ad3 |
42887891 has 2 divisors, whose sum is σ = 42887892. Its totient is φ = 42887890.
The previous prime is 42887869. The next prime is 42887909. The reversal of 42887891 is 19878824.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 42887891 - 26 = 42887827 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (42887851) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21443945 + 21443946.
It is an arithmetic number, because the mean of its divisors is an integer number (21443946).
Almost surely, 242887891 is an apocalyptic number.
42887891 is a deficient number, since it is larger than the sum of its proper divisors (1).
42887891 is an equidigital number, since it uses as much as digits as its factorization.
42887891 is an evil number, because the sum of its binary digits is even.
The product of its digits is 258048, while the sum is 47.
The square root of 42887891 is about 6548.8847142090. The cubic root of 42887891 is about 350.0350740361.
The spelling of 42887891 in words is "forty-two million, eight hundred eighty-seven thousand, eight hundred ninety-one".
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