89904571 has 2 divisors, whose sum is σ = 89904572. Its totient is φ = 89904570.

The previous prime is 89904569. The next prime is 89904623. The reversal of 89904571 is 17540998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89904571 - 2¹ = 89904569 is a prime.

Together with 89904569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89904071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44952285 + 44952286.

It is an arithmetic number, because the mean of its divisors is an integer number (44952286).

Almost surely, 2^89904571 is an apocalyptic number.

89904571 is a deficient number, since it is larger than the sum of its proper divisors (1).

89904571 is an equidigital number, since it uses as much as digits as its factorization.

89904571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 89904571 is about 9481.8020966481. The cubic root of 89904571 is about 447.9820275395.

The spelling of 89904571 in words is "eighty-nine million, nine hundred four thousand, five hundred seventy-one".