89926821 has 16 divisors (see below), whose sum is σ = 141062400. Its totient is φ = 56424384.

The previous prime is 89926813. The next prime is 89926841. The reversal of 89926821 is 12862998.

It is not a de Polignac number, because 89926821 - 2³ = 89926813 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89926841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97501 + ... + 98418.

It is an arithmetic number, because the mean of its divisors is an integer number (8816400).

Almost surely, 2^89926821 is an apocalyptic number.

It is an amenable number.

89926821 is a deficient number, since it is larger than the sum of its proper divisors (51135579).

89926821 is a wasteful number, since it uses less digits than its factorization.

89926821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195945 (or 195939 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 89926821 is about 9482.9753242324. The cubic root of 89926821 is about 448.0189807142.

The spelling of 89926821 in words is "eighty-nine million, nine hundred twenty-six thousand, eight hundred twenty-one".