74631 has 4 divisors (see below), whose sum is σ = 99512. Its totient is φ = 49752.

The previous prime is 74623. The next prime is 74653. The reversal of 74631 is 13647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13647 = 3 ⋅4549.

It is not a de Polignac number, because 74631 - 2³ = 74623 is a prime.

It is a super-2 number, since 2×74631² = 11139572322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 74598 and 74607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74611) 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, 12436 + ... + 12441.

It is an arithmetic number, because the mean of its divisors is an integer number (24878).

2⁷⁴⁶³¹ is an apocalyptic number.

74631 is a deficient number, since it is larger than the sum of its proper divisors (24881).

74631 is a wasteful number, since it uses less digits than its factorization.

74631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24880.

The product of its digits is 504, while the sum is 21.

The square root of 74631 is about 273.1867493126. The cubic root of 74631 is about 42.1023580507.

It can be divided in two parts, 746 and 31, that added together give a palindrome (777).

The spelling of 74631 in words is "seventy-four thousand, six hundred thirty-one".