89970091 has 16 divisors (see below), whose sum is σ = 95477760. Its totient is φ = 84663360.

The previous prime is 89970071. The next prime is 89970107. The reversal of 89970091 is 19007998.

It is a cyclic number.

It is not a de Polignac number, because 89970091 - 2²⁵ = 56415659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89970071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187590 + ... + 188068.

It is an arithmetic number, because the mean of its divisors is an integer number (5967360).

Almost surely, 2^89970091 is an apocalyptic number.

89970091 is a deficient number, since it is larger than the sum of its proper divisors (5507669).

89970091 is a wasteful number, since it uses less digits than its factorization.

89970091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 89970091 is about 9485.2565068110. The cubic root of 89970091 is about 448.0908268095.

The spelling of 89970091 in words is "eighty-nine million, nine hundred seventy thousand, ninety-one".