72075907 has 4 divisors (see below), whose sum is σ = 72356616. Its totient is φ = 71795200.

The previous prime is 72075851. The next prime is 72075917. The reversal of 72075907 is 70957027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72075907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72075917) 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, 139969 + ... + 140482.

It is an arithmetic number, because the mean of its divisors is an integer number (18089154).

Almost surely, 2^72075907 is an apocalyptic number.

72075907 is a deficient number, since it is larger than the sum of its proper divisors (280709).

72075907 is a wasteful number, since it uses less digits than its factorization.

72075907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280708.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 72075907 is about 8489.7530588351. The cubic root of 72075907 is about 416.1629104144.

The spelling of 72075907 in words is "seventy-two million, seventy-five thousand, nine hundred seven".