72936647 has 12 divisors (see below), whose sum is σ = 89836560. Its totient is φ = 58838976.

The previous prime is 72936637. The next prime is 72936679. The reversal of 72936647 is 74663927.

It is a happy number.

It is not a de Polignac number, because 72936647 - 2⁴ = 72936631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72936598 and 72936607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72936607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42947 + ... + 44612.

It is an arithmetic number, because the mean of its divisors is an integer number (7486380).

Almost surely, 2^72936647 is an apocalyptic number.

72936647 is a deficient number, since it is larger than the sum of its proper divisors (16899913).

72936647 is a wasteful number, since it uses less digits than its factorization.

72936647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87590 (or 87583 counting only the distinct ones).

The product of its digits is 381024, while the sum is 44.

The square root of 72936647 is about 8540.2954866913. The cubic root of 72936647 is about 417.8129834246.

The spelling of 72936647 in words is "seventy-two million, nine hundred thirty-six thousand, six hundred forty-seven".