89424921 has 4 divisors (see below), whose sum is σ = 119233232. Its totient is φ = 59616612.

The previous prime is 89424917. The next prime is 89424931. The reversal of 89424921 is 12942498.

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 not a de Polignac number, because 89424921 - 2² = 89424917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89424921.

It is not an unprimeable number, because it can be changed into a prime (89424901) 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, 14904151 + ... + 14904156.

It is an arithmetic number, because the mean of its divisors is an integer number (29808308).

Almost surely, 2^89424921 is an apocalyptic number.

It is an amenable number.

89424921 is a deficient number, since it is larger than the sum of its proper divisors (29808311).

89424921 is a wasteful number, since it uses less digits than its factorization.

89424921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29808310.

The product of its digits is 41472, while the sum is 39.

The square root of 89424921 is about 9456.4750832432. The cubic root of 89424921 is about 447.1839300322.

The spelling of 89424921 in words is "eighty-nine million, four hundred twenty-four thousand, nine hundred twenty-one".