632731213 has 2 divisors, whose sum is σ = 632731214. Its totient is φ = 632731212.

The previous prime is 632731207. The next prime is 632731261. The reversal of 632731213 is 312137236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537219684 + 95511529 = 23178^2 + 9773^2 .

It is a cyclic number.

It is not a de Polignac number, because 632731213 - 2²¹ = 630634061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (632731513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316365606 + 316365607.

It is an arithmetic number, because the mean of its divisors is an integer number (316365607).

Almost surely, 2^632731213 is an apocalyptic number.

It is an amenable number.

632731213 is a deficient number, since it is larger than the sum of its proper divisors (1).

632731213 is an equidigital number, since it uses as much as digits as its factorization.

632731213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 28.

The square root of 632731213 is about 25154.1490215829. The cubic root of 632731213 is about 858.4989196943.

Adding to 632731213 its reverse (312137236), we get a palindrome (944868449).

The spelling of 632731213 in words is "six hundred thirty-two million, seven hundred thirty-one thousand, two hundred thirteen".