636324313 has 2 divisors, whose sum is σ = 636324314. Its totient is φ = 636324312.

The previous prime is 636324257. The next prime is 636324323. The reversal of 636324313 is 313423636.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570827664 + 65496649 = 23892^2 + 8093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636324313 is a prime.

It is not a weakly prime, because it can be changed into another prime (636324323) 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, 318162156 + 318162157.

It is an arithmetic number, because the mean of its divisors is an integer number (318162157).

Almost surely, 2^636324313 is an apocalyptic number.

It is an amenable number.

636324313 is a deficient number, since it is larger than the sum of its proper divisors (1).

636324313 is an equidigital number, since it uses as much as digits as its factorization.

636324313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 31.

The square root of 636324313 is about 25225.4695298224. The cubic root of 636324313 is about 860.1209100778.

Adding to 636324313 its reverse (313423636), we get a palindrome (949747949).

The spelling of 636324313 in words is "six hundred thirty-six million, three hundred twenty-four thousand, three hundred thirteen".