89706921 has 4 divisors (see below), whose sum is σ = 119609232. Its totient is φ = 59804612.

The previous prime is 89706917. The next prime is 89706937. The reversal of 89706921 is 12960798.

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 89706921 - 2² = 89706917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89706941) 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 3 ways as a sum of consecutive naturals, for example, 14951151 + ... + 14951156.

It is an arithmetic number, because the mean of its divisors is an integer number (29902308).

Almost surely, 2^89706921 is an apocalyptic number.

It is an amenable number.

89706921 is a deficient number, since it is larger than the sum of its proper divisors (29902311).

89706921 is a wasteful number, since it uses less digits than its factorization.

89706921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29902310.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 89706921 is about 9471.3737651937. The cubic root of 89706921 is about 447.6534991449.

The spelling of 89706921 in words is "eighty-nine million, seven hundred six thousand, nine hundred twenty-one".