89579521 has 4 divisors (see below), whose sum is σ = 92668500. Its totient is φ = 86490544.

The previous prime is 89579489. The next prime is 89579527. The reversal of 89579521 is 12597598.

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 22667121 + 66912400 = 4761^2 + 8180^2 .

It is a cyclic number.

It is not a de Polignac number, because 89579521 - 2⁵ = 89579489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89579527) 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, 1544446 + ... + 1544503.

It is an arithmetic number, because the mean of its divisors is an integer number (23167125).

Almost surely, 2^89579521 is an apocalyptic number.

It is an amenable number.

89579521 is a deficient number, since it is larger than the sum of its proper divisors (3088979).

89579521 is a wasteful number, since it uses less digits than its factorization.

89579521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088978.

The product of its digits is 226800, while the sum is 46.

The square root of 89579521 is about 9464.6458465174. The cubic root of 89579521 is about 447.4414825223.

It can be divided in two parts, 89579 and 521, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 89579521 in words is "eighty-nine million, five hundred seventy-nine thousand, five hundred twenty-one".