74397631 has 24 divisors (see below), whose sum is σ = 95606784. Its totient is φ = 57239280.

The previous prime is 74397629. The next prime is 74397647. The reversal of 74397631 is 13679347.

It is not a de Polignac number, because 74397631 - 2¹ = 74397629 is a prime.

It is a super-2 number, since 2×74397631² = 11070014996824322, which contains 22 as substring.

Its product of digits (95256) is a multiple of the sum of its prime divisors (1764).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74397031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43906 + ... + 45568.

It is an arithmetic number, because the mean of its divisors is an integer number (3983616).

Almost surely, 2^74397631 is an apocalyptic number.

74397631 is a deficient number, since it is larger than the sum of its proper divisors (21209153).

74397631 is a wasteful number, since it uses less digits than its factorization.

74397631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 1764 counting only the distinct ones).

The product of its digits is 95256, while the sum is 40.

The square root of 74397631 is about 8625.4061353655. The cubic root of 74397631 is about 420.5842794004.

The spelling of 74397631 in words is "seventy-four million, three hundred ninety-seven thousand, six hundred thirty-one".