90308637 has 6 divisors (see below), whose sum is σ = 130445822. Its totient is φ = 60205752.

The previous prime is 90308627. The next prime is 90308681. The reversal of 90308637 is 73680309.

It can be written as a sum of positive squares in only one way, i.e., 67469796 + 22838841 = 8214^2 + 4779^2 .

It is not a de Polignac number, because 90308637 - 2⁷ = 90308509 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 (90308627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5017138 + ... + 5017155.

Almost surely, 2^90308637 is an apocalyptic number.

It is an amenable number.

90308637 is a deficient number, since it is larger than the sum of its proper divisors (40137185).

90308637 is a wasteful number, since it uses less digits than its factorization.

90308637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034299 (or 10034296 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 90308637 is about 9503.0856567749. The cubic root of 90308637 is about 448.6521595702.

The spelling of 90308637 in words is "ninety million, three hundred eight thousand, six hundred thirty-seven".