90638671 has 8 divisors (see below), whose sum is σ = 92250144. Its totient is φ = 89036640.

The previous prime is 90638663. The next prime is 90638677. The reversal of 90638671 is 17683609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90638671 - 2³ = 90638663 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 (90638677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18625 + ... + 22981.

It is an arithmetic number, because the mean of its divisors is an integer number (11531268).

Almost surely, 2^90638671 is an apocalyptic number.

90638671 is a deficient number, since it is larger than the sum of its proper divisors (1611473).

90638671 is a wasteful number, since it uses less digits than its factorization.

90638671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90638671 is about 9520.4343913500. The cubic root of 90638671 is about 449.1980300501.

The spelling of 90638671 in words is "ninety million, six hundred thirty-eight thousand, six hundred seventy-one".