631913323 has 2 divisors, whose sum is σ = 631913324. Its totient is φ = 631913322.

The previous prime is 631913299. The next prime is 631913353. The reversal of 631913323 is 323319136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631913323 - 2¹⁷ = 631782251 is a prime.

It is not a weakly prime, because it can be changed into another prime (631913353) 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, 315956661 + 315956662.

It is an arithmetic number, because the mean of its divisors is an integer number (315956662).

Almost surely, 2^631913323 is an apocalyptic number.

631913323 is a deficient number, since it is larger than the sum of its proper divisors (1).

631913323 is an equidigital number, since it uses as much as digits as its factorization.

631913323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 31.

The square root of 631913323 is about 25137.8862078736. The cubic root of 631913323 is about 858.1288518420.

It can be divided in two parts, 631913 and 323, that added together give a palindrome (632236).

The spelling of 631913323 in words is "six hundred thirty-one million, nine hundred thirteen thousand, three hundred twenty-three".