89998521 has 4 divisors (see below), whose sum is σ = 119998032. Its totient is φ = 59999012.

The previous prime is 89998507. The next prime is 89998529. The reversal of 89998521 is 12589998.

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 a de Polignac number, because none of the positive numbers 2^k-89998521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89998529) 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, 14999751 + ... + 14999756.

It is an arithmetic number, because the mean of its divisors is an integer number (29999508).

Almost surely, 2^89998521 is an apocalyptic number.

It is an amenable number.

89998521 is a deficient number, since it is larger than the sum of its proper divisors (29999511).

89998521 is a wasteful number, since it uses less digits than its factorization.

89998521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29999510.

The product of its digits is 466560, while the sum is 51.

The square root of 89998521 is about 9486.7550300406. The cubic root of 89998521 is about 448.1380198283.

The spelling of 89998521 in words is "eighty-nine million, nine hundred ninety-eight thousand, five hundred twenty-one".