89131879 has 4 divisors (see below), whose sum is σ = 89311000. Its totient is φ = 88952760.

The previous prime is 89131871. The next prime is 89131891. The reversal of 89131879 is 97813198.

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 89131879 - 2³ = 89131871 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 (89131871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88812 + ... + 89809.

It is an arithmetic number, because the mean of its divisors is an integer number (22327750).

Almost surely, 2^89131879 is an apocalyptic number.

89131879 is a deficient number, since it is larger than the sum of its proper divisors (179121).

89131879 is a wasteful number, since it uses less digits than its factorization.

89131879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179120.

The product of its digits is 108864, while the sum is 46.

The square root of 89131879 is about 9440.9681177303. The cubic root of 89131879 is about 446.6949273597.

The spelling of 89131879 in words is "eighty-nine million, one hundred thirty-one thousand, eight hundred seventy-nine".