89966639 has 16 divisors (see below), whose sum is σ = 107661312. Its totient is φ = 73506048.

The previous prime is 89966633. The next prime is 89966693. The reversal of 89966639 is 93666998.

It is a de Polignac number, because none of the positive numbers 2^k-89966639 is a prime.

It is a super-2 number, since 2×89966639² = 16187992265912642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89966633) 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, 56042 + ... + 57624.

It is an arithmetic number, because the mean of its divisors is an integer number (6728832).

Almost surely, 2^89966639 is an apocalyptic number.

89966639 is a deficient number, since it is larger than the sum of its proper divisors (17694673).

89966639 is a wasteful number, since it uses less digits than its factorization.

89966639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966.

The product of its digits is 3779136, while the sum is 56.

The square root of 89966639 is about 9485.0745384525. The cubic root of 89966639 is about 448.0850959075.

The spelling of 89966639 in words is "eighty-nine million, nine hundred sixty-six thousand, six hundred thirty-nine".