90637957 has 4 divisors (see below), whose sum is σ = 90661216. Its totient is φ = 90614700.

The previous prime is 90637951. The next prime is 90637973. The reversal of 90637957 is 75973609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90637957 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 (90637951) 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, 4203 + ... + 14104.

It is an arithmetic number, because the mean of its divisors is an integer number (22665304).

Almost surely, 2^90637957 is an apocalyptic number.

It is an amenable number.

90637957 is a deficient number, since it is larger than the sum of its proper divisors (23259).

90637957 is a wasteful number, since it uses less digits than its factorization.

90637957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23258.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 90637957 is about 9520.3968929872. The cubic root of 90637957 is about 449.1968505380.

It can be divided in two parts, 9063 and 7957, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 90637957 in words is "ninety million, six hundred thirty-seven thousand, nine hundred fifty-seven".