89775921 has 8 divisors (see below), whose sum is σ = 120328704. Its totient is φ = 59536880.

The previous prime is 89775899. The next prime is 89776013. The reversal of 89775921 is 12957798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89775921 - 2¹⁸ = 89513777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89775221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77766 + ... + 78911.

It is an arithmetic number, because the mean of its divisors is an integer number (15041088).

Almost surely, 2^89775921 is an apocalyptic number.

It is an amenable number.

89775921 is a deficient number, since it is larger than the sum of its proper divisors (30552783).

89775921 is a wasteful number, since it uses less digits than its factorization.

89775921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156871.

The product of its digits is 317520, while the sum is 48.

The square root of 89775921 is about 9475.0156200399. The cubic root of 89775921 is about 447.7682438233.

The spelling of 89775921 in words is "eighty-nine million, seven hundred seventy-five thousand, nine hundred twenty-one".