89716921 has 4 divisors (see below), whose sum is σ = 102533632. Its totient is φ = 76900212.

The previous prime is 89716873. The next prime is 89716931. The reversal of 89716921 is 12961798.

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 89716921 - 2⁷ = 89716793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89716931) 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, 6408345 + ... + 6408358.

It is an arithmetic number, because the mean of its divisors is an integer number (25633408).

Almost surely, 2^89716921 is an apocalyptic number.

It is an amenable number.

89716921 is a deficient number, since it is larger than the sum of its proper divisors (12816711).

89716921 is a wasteful number, since it uses less digits than its factorization.

89716921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12816710.

The product of its digits is 54432, while the sum is 43.

The square root of 89716921 is about 9471.9016570064. The cubic root of 89716921 is about 447.6701324534.

The spelling of 89716921 in words is "eighty-nine million, seven hundred sixteen thousand, nine hundred twenty-one".