631263823 has 2 divisors, whose sum is σ = 631263824. Its totient is φ = 631263822.

The previous prime is 631263803. The next prime is 631263863. The reversal of 631263823 is 328362136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631263823 - 2⁵ = 631263791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631263803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315631911 + 315631912.

It is an arithmetic number, because the mean of its divisors is an integer number (315631912).

Almost surely, 2^631263823 is an apocalyptic number.

631263823 is a deficient number, since it is larger than the sum of its proper divisors (1).

631263823 is an equidigital number, since it uses as much as digits as its factorization.

631263823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 631263823 is about 25124.9641392779. The cubic root of 631263823 is about 857.8347472903.

The spelling of 631263823 in words is "six hundred thirty-one million, two hundred sixty-three thousand, eight hundred twenty-three".