89007521 has 4 divisors (see below), whose sum is σ = 89158212. Its totient is φ = 88856832.

The previous prime is 89007509. The next prime is 89007559. The reversal of 89007521 is 12570098.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45711121 + 43296400 = 6761^2 + 6580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89007521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89007421) 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, 74456 + ... + 75641.

It is an arithmetic number, because the mean of its divisors is an integer number (22289553).

Almost surely, 2^89007521 is an apocalyptic number.

It is an amenable number.

89007521 is a deficient number, since it is larger than the sum of its proper divisors (150691).

89007521 is a wasteful number, since it uses less digits than its factorization.

89007521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150690.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 89007521 is about 9434.3797358385. The cubic root of 89007521 is about 446.4870857390.

The spelling of 89007521 in words is "eighty-nine million, seven thousand, five hundred twenty-one".