89664687 has 18 divisors (see below), whose sum is σ = 148142072. Its totient is φ = 51194016.

The previous prime is 89664683. The next prime is 89664697. The reversal of 89664687 is 78646698.

It is not a de Polignac number, because 89664687 - 2² = 89664683 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 (89664683) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 74563 + ... + 75755.

Almost surely, 2^89664687 is an apocalyptic number.

89664687 is a deficient number, since it is larger than the sum of its proper divisors (58477385).

89664687 is an equidigital number, since it uses as much as digits as its factorization.

89664687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399 (or 1203 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 89664687 is about 9469.1439423002. The cubic root of 89664687 is about 447.5832363920.

The spelling of 89664687 in words is "eighty-nine million, six hundred sixty-four thousand, six hundred eighty-seven".