74137631 has 8 divisors (see below), whose sum is σ = 75516000. Its totient is φ = 72764640.

The previous prime is 74137627. The next prime is 74137643. The reversal of 74137631 is 13673147.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74137631 - 2² = 74137627 is a prime.

It is a super-2 number, since 2×74137631² = 10992776660584322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74137621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35525 + ... + 37553.

It is an arithmetic number, because the mean of its divisors is an integer number (9439500).

Almost surely, 2^74137631 is an apocalyptic number.

74137631 is a deficient number, since it is larger than the sum of its proper divisors (1378369).

74137631 is a wasteful number, since it uses less digits than its factorization.

74137631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689.

The product of its digits is 10584, while the sum is 32.

The square root of 74137631 is about 8610.3211902925. The cubic root of 74137631 is about 420.0937640243.

The spelling of 74137631 in words is "seventy-four million, one hundred thirty-seven thousand, six hundred thirty-one".