631679837 has 4 divisors (see below), whose sum is σ = 632639040. Its totient is φ = 630720636.

The previous prime is 631679821. The next prime is 631679857. The reversal of 631679837 is 738976136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631679837 - 2⁴ = 631679821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631679857) 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 in 3 ways as a sum of consecutive naturals, for example, 478613 + ... + 479930.

It is an arithmetic number, because the mean of its divisors is an integer number (158159760).

Almost surely, 2^631679837 is an apocalyptic number.

It is an amenable number.

631679837 is a deficient number, since it is larger than the sum of its proper divisors (959203).

631679837 is an equidigital number, since it uses as much as digits as its factorization.

631679837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959202.

The product of its digits is 1143072, while the sum is 50.

The square root of 631679837 is about 25133.2416731308. The cubic root of 631679837 is about 858.0231486556.

The spelling of 631679837 in words is "six hundred thirty-one million, six hundred seventy-nine thousand, eight hundred thirty-seven".