89938521 has 6 divisors (see below), whose sum is σ = 129911210. Its totient is φ = 59959008.

The previous prime is 89938493. The next prime is 89938547. The reversal of 89938521 is 12583998.

It is a happy number.

89938521 is a `hidden beast` number, since 8 + 99 + 38 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 89870400 + 68121 = 9480^2 + 261^2 .

It is not a de Polignac number, because 89938521 - 2⁵ = 89938489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89938561) 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, 4996576 + ... + 4996593.

Almost surely, 2^89938521 is an apocalyptic number.

It is an amenable number.

89938521 is a deficient number, since it is larger than the sum of its proper divisors (39972689).

89938521 is a wasteful number, since it uses less digits than its factorization.

89938521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993175 (or 9993172 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 89938521 is about 9483.5921991617. The cubic root of 89938521 is about 448.0384098259.

The spelling of 89938521 in words is "eighty-nine million, nine hundred thirty-eight thousand, five hundred twenty-one".