631639043 has 8 divisors (see below), whose sum is σ = 745159680. Its totient is φ = 523940040.

The previous prime is 631639037. The next prime is 631639051. The reversal of 631639043 is 340936136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631639043 - 2⁴ = 631639027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631638994 and 631639012.

It is not an unprimeable number, because it can be changed into a prime (631639093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455173 + ... + 1455606.

It is an arithmetic number, because the mean of its divisors is an integer number (93144960).

Almost surely, 2^631639043 is an apocalyptic number.

631639043 is a deficient number, since it is larger than the sum of its proper divisors (113520637).

631639043 is a wasteful number, since it uses less digits than its factorization.

631639043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910817.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 631639043 is about 25132.4301053440. The cubic root of 631639043 is about 858.0046778271.

The spelling of 631639043 in words is "six hundred thirty-one million, six hundred thirty-nine thousand, forty-three".