74765631 has 4 divisors (see below), whose sum is σ = 99687512. Its totient is φ = 49843752.

The previous prime is 74765611. The next prime is 74765633. The reversal of 74765631 is 13656747.

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

It is not a de Polignac number, because 74765631 - 2⁷ = 74765503 is a prime.

It is a super-2 number, since 2×74765631² = 11179799157656322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74765631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74765633) 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, 12460936 + ... + 12460941.

It is an arithmetic number, because the mean of its divisors is an integer number (24921878).

Almost surely, 2^74765631 is an apocalyptic number.

74765631 is a deficient number, since it is larger than the sum of its proper divisors (24921881).

74765631 is a wasteful number, since it uses less digits than its factorization.

74765631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24921880.

The product of its digits is 105840, while the sum is 39.

The square root of 74765631 is about 8646.7121497133. The cubic root of 74765631 is about 421.2765976860.

The spelling of 74765631 in words is "seventy-four million, seven hundred sixty-five thousand, six hundred thirty-one".