89724879 has 6 divisors (see below), whose sum is σ = 129602616. Its totient is φ = 59816580.

The previous prime is 89724871. The next prime is 89724907. The reversal of 89724879 is 97842798.

It is not a de Polignac number, because 89724879 - 2³ = 89724871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89724871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4984707 + ... + 4984724.

It is an arithmetic number, because the mean of its divisors is an integer number (21600436).

Almost surely, 2^89724879 is an apocalyptic number.

89724879 is a deficient number, since it is larger than the sum of its proper divisors (39877737).

89724879 is a wasteful number, since it uses less digits than its factorization.

89724879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969437 (or 9969434 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 89724879 is about 9472.3217322893. The cubic root of 89724879 is about 447.6833683571.

The spelling of 89724879 in words is "eighty-nine million, seven hundred twenty-four thousand, eight hundred seventy-nine".