89071021 has 4 divisors (see below), whose sum is σ = 95922652. Its totient is φ = 82219392.

The previous prime is 89071009. The next prime is 89071027. The reversal of 89071021 is 12017098.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 70795396 = 4275^2 + 8414^2 .

It is a cyclic number.

It is not a de Polignac number, because 89071021 - 2¹³ = 89062829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89071027) 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, 3425796 + ... + 3425821.

It is an arithmetic number, because the mean of its divisors is an integer number (23980663).

Almost surely, 2^89071021 is an apocalyptic number.

It is an amenable number.

89071021 is a deficient number, since it is larger than the sum of its proper divisors (6851631).

89071021 is a wasteful number, since it uses less digits than its factorization.

89071021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851630.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 89071021 is about 9437.7444868994. The cubic root of 89071021 is about 446.5932385299.

The spelling of 89071021 in words is "eighty-nine million, seventy-one thousand, twenty-one".