89566879 has 4 divisors (see below), whose sum is σ = 89587576. Its totient is φ = 89546184.

The previous prime is 89566871. The next prime is 89566889. The reversal of 89566879 is 97866598.

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

It is a cyclic number.

It is not a de Polignac number, because 89566879 - 2³ = 89566871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89566871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104 + ... + 13429.

It is an arithmetic number, because the mean of its divisors is an integer number (22396894).

Almost surely, 2^89566879 is an apocalyptic number.

89566879 is a deficient number, since it is larger than the sum of its proper divisors (20697).

89566879 is a wasteful number, since it uses less digits than its factorization.

89566879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20696.

The product of its digits is 6531840, while the sum is 58.

The square root of 89566879 is about 9463.9779691206. The cubic root of 89566879 is about 447.4204329890.

The spelling of 89566879 in words is "eighty-nine million, five hundred sixty-six thousand, eight hundred seventy-nine".