631896479 has 4 divisors (see below), whose sum is σ = 632033376. Its totient is φ = 631759584.

The previous prime is 631896449. The next prime is 631896487. The reversal of 631896479 is 974698136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631896479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631896479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631896439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61274 + ... + 70839.

It is an arithmetic number, because the mean of its divisors is an integer number (158008344).

Almost surely, 2^631896479 is an apocalyptic number.

631896479 is a deficient number, since it is larger than the sum of its proper divisors (136897).

631896479 is a wasteful number, since it uses less digits than its factorization.

631896479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136896.

The product of its digits is 1959552, while the sum is 53.

The square root of 631896479 is about 25137.5511734934. The cubic root of 631896479 is about 858.1212271408.

The spelling of 631896479 in words is "six hundred thirty-one million, eight hundred ninety-six thousand, four hundred seventy-nine".