631919044 has 9 divisors (see below), whose sum is σ = 1105946317. Its totient is φ = 315934384.

The previous prime is 631919027. The next prime is 631919063. The reversal of 631919044 is 440919136.

The square root of 631919044 is 25138.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 626901444 + 5017600 = 25038^2 + 2240^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631918994 and 631919012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 43992 + ... + 56560.

Almost surely, 2^631919044 is an apocalyptic number.

631919044 is the 25138-th square number.

It is an amenable number.

631919044 is a deficient number, since it is larger than the sum of its proper divisors (474027273).

631919044 is an frugal number, since it uses more digits than its factorization.

631919044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25142 (or 12571 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The cubic root of 631919044 is about 858.1314415117.

The spelling of 631919044 in words is "six hundred thirty-one million, nine hundred nineteen thousand, forty-four".