72637975 has 12 divisors (see below), whose sum is σ = 90206280. Its totient is φ = 58023200.

The previous prime is 72637967. The next prime is 72637997. The reversal of 72637975 is 57973627.

It is a happy number.

It is not a de Polignac number, because 72637975 - 2³ = 72637967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18756 + ... + 22294.

It is an arithmetic number, because the mean of its divisors is an integer number (7517190).

Almost surely, 2^72637975 is an apocalyptic number.

72637975 is a deficient number, since it is larger than the sum of its proper divisors (17568305).

72637975 is a wasteful number, since it uses less digits than its factorization.

72637975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4365 counting only the distinct ones).

The product of its digits is 555660, while the sum is 46.

The square root of 72637975 is about 8522.7915027883. The cubic root of 72637975 is about 417.2418952812.

The spelling of 72637975 in words is "seventy-two million, six hundred thirty-seven thousand, nine hundred seventy-five".