89388521 has 4 divisors (see below), whose sum is σ = 94093200. Its totient is φ = 84683844.

The previous prime is 89388473. The next prime is 89388571. The reversal of 89388521 is 12588398.

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 a cyclic number.

It is not a de Polignac number, because 89388521 - 2⁶ = 89388457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89388571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2352311 + ... + 2352348.

It is an arithmetic number, because the mean of its divisors is an integer number (23523300).

Almost surely, 2^89388521 is an apocalyptic number.

It is an amenable number.

89388521 is a deficient number, since it is larger than the sum of its proper divisors (4704679).

89388521 is a wasteful number, since it uses less digits than its factorization.

89388521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4704678.

The product of its digits is 138240, while the sum is 44.

The square root of 89388521 is about 9454.5502801561. The cubic root of 89388521 is about 447.1232470819.

The spelling of 89388521 in words is "eighty-nine million, three hundred eighty-eight thousand, five hundred twenty-one".