89931577 has 4 divisors (see below), whose sum is σ = 90062416. Its totient is φ = 89800740.

The previous prime is 89931553. The next prime is 89931601. The reversal of 89931577 is 77513998.

89931577 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (89931553) and next prime (89931601).

It is a cyclic number.

It is not a de Polignac number, because 89931577 - 2²³ = 81542969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89931577.

It is not an unprimeable number, because it can be changed into a prime (89931077) 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, 64383 + ... + 65764.

It is an arithmetic number, because the mean of its divisors is an integer number (22515604).

Almost surely, 2^89931577 is an apocalyptic number.

It is an amenable number.

89931577 is a deficient number, since it is larger than the sum of its proper divisors (130839).

89931577 is a wasteful number, since it uses less digits than its factorization.

89931577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130838.

The product of its digits is 476280, while the sum is 49.

The square root of 89931577 is about 9483.2260860954. The cubic root of 89931577 is about 448.0268787684.

The spelling of 89931577 in words is "eighty-nine million, nine hundred thirty-one thousand, five hundred seventy-seven".