631372879 has 2 divisors, whose sum is σ = 631372880. Its totient is φ = 631372878.

The previous prime is 631372849. The next prime is 631372909. The reversal of 631372879 is 978273136.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (631372849) and next prime (631372909).

It is a cyclic number.

It is not a de Polignac number, because 631372879 - 2¹⁵ = 631340111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631372829) 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, 315686439 + 315686440.

It is an arithmetic number, because the mean of its divisors is an integer number (315686440).

Almost surely, 2^631372879 is an apocalyptic number.

631372879 is a deficient number, since it is larger than the sum of its proper divisors (1).

631372879 is an equidigital number, since it uses as much as digits as its factorization.

631372879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 631372879 is about 25127.1343173073. The cubic root of 631372879 is about 857.8841437739.

The spelling of 631372879 in words is "six hundred thirty-one million, three hundred seventy-two thousand, eight hundred seventy-nine".