89885665 has 4 divisors (see below), whose sum is σ = 107862804. Its totient is φ = 71908528.

The previous prime is 89885581. The next prime is 89885683. The reversal of 89885665 is 56658898.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69155856 + 20729809 = 8316^2 + 4553^2 .

It is a cyclic number.

It is not a de Polignac number, because 89885665 - 2⁹ = 89885153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8988562 + ... + 8988571.

It is an arithmetic number, because the mean of its divisors is an integer number (26965701).

Almost surely, 2^89885665 is an apocalyptic number.

It is an amenable number.

89885665 is a deficient number, since it is larger than the sum of its proper divisors (17977139).

89885665 is a wasteful number, since it uses less digits than its factorization.

89885665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17977138.

The product of its digits is 4147200, while the sum is 55.

The square root of 89885665 is about 9480.8050818483. The cubic root of 89885665 is about 447.9506233448.

The spelling of 89885665 in words is "eighty-nine million, eight hundred eighty-five thousand, six hundred sixty-five".