631379893 has 2 divisors, whose sum is σ = 631379894. Its totient is φ = 631379892.

The previous prime is 631379873. The next prime is 631379939. The reversal of 631379893 is 398973136.

631379893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586463089 + 44916804 = 24217^2 + 6702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631379893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631379863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315689946 + 315689947.

It is an arithmetic number, because the mean of its divisors is an integer number (315689947).

Almost surely, 2^631379893 is an apocalyptic number.

It is an amenable number.

631379893 is a deficient number, since it is larger than the sum of its proper divisors (1).

631379893 is an equidigital number, since it uses as much as digits as its factorization.

631379893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 49.

The square root of 631379893 is about 25127.2738871530. The cubic root of 631379893 is about 857.8873205428.

The spelling of 631379893 in words is "six hundred thirty-one million, three hundred seventy-nine thousand, eight hundred ninety-three".