631732 has 6 divisors (see below), whose sum is σ = 1105538. Its totient is φ = 315864.

The previous prime is 631723. The next prime is 631733. The reversal of 631732 is 237136.

631732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 1296 = 794^2 + 36^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631733) by changing a digit.

631732 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78963 + ... + 78970.

2⁶³¹⁷³² is an apocalyptic number.

It is an amenable number.

631732 is a deficient number, since it is larger than the sum of its proper divisors (473806).

631732 is a wasteful number, since it uses less digits than its factorization.

631732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157937 (or 157935 counting only the distinct ones).

The product of its digits is 756, while the sum is 22.

The square root of 631732 is about 794.8157019083. The cubic root of 631732 is about 85.8046766015.

Adding to 631732 its reverse (237136), we get a palindrome (868868).

The spelling of 631732 in words is "six hundred thirty-one thousand, seven hundred thirty-two".