72089631 has 6 divisors (see below), whose sum is σ = 104129480. Its totient is φ = 48059748.

The previous prime is 72089623. The next prime is 72089669. The reversal of 72089631 is 13698027.

It is not a de Polignac number, because 72089631 - 2³ = 72089623 is a prime.

It is a super-2 number, since 2×72089631² = 10393829795432322, 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 (72089671) 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, 4004971 + ... + 4004988.

Almost surely, 2^72089631 is an apocalyptic number.

72089631 is a deficient number, since it is larger than the sum of its proper divisors (32039849).

72089631 is a wasteful number, since it uses less digits than its factorization.

72089631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8009965 (or 8009962 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 72089631 is about 8490.5612888666. The cubic root of 72089631 is about 416.1893226491.

The spelling of 72089631 in words is "seventy-two million, eighty-nine thousand, six hundred thirty-one".