74572731 has 10 divisors (see below), whose sum is σ = 111398892. Its totient is φ = 49715100.

The previous prime is 74572711. The next prime is 74572741. The reversal of 74572731 is 13727547.

It is not a de Polignac number, because 74572731 - 2⁵ = 74572699 is a prime.

It is a super-2 number, since 2×74572731² = 11122184417596722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74572711) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 460245 + ... + 460406.

Almost surely, 2^74572731 is an apocalyptic number.

74572731 is a deficient number, since it is larger than the sum of its proper divisors (36826161).

74572731 is an equidigital number, since it uses as much as digits as its factorization.

74572731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920663 (or 920654 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 74572731 is about 8635.5504167366. The cubic root of 74572731 is about 420.9139789983.

The spelling of 74572731 in words is "seventy-four million, five hundred seventy-two thousand, seven hundred thirty-one".