73631 has 4 divisors (see below), whose sum is σ = 76200. Its totient is φ = 71064.

The previous prime is 73613. The next prime is 73637. The reversal of 73631 is 13637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13637 = 13 ⋅1049.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73631 is a prime.

It is a super-2 number, since 2×73631² = 10843048322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 73631.

It is not an unprimeable number, because it can be changed into a prime (73637) 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, 1241 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (19050).

2⁷³⁶³¹ is an apocalyptic number.

73631 is a deficient number, since it is larger than the sum of its proper divisors (2569).

73631 is a wasteful number, since it uses less digits than its factorization.

73631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568.

The product of its digits is 378, while the sum is 20.

The square root of 73631 is about 271.3503270682. The cubic root of 73631 is about 41.9134650648.

It can be divided in two parts, 736 and 31, that added together give a palindrome (767).

The spelling of 73631 in words is "seventy-three thousand, six hundred thirty-one".