631121392 has 20 divisors (see below), whose sum is σ = 1333961496. Its totient is φ = 286873280.

The previous prime is 631121389. The next prime is 631121411. The reversal of 631121392 is 293121136.

631121392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×631121392² = 796628422880035328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 631121392.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792783 + ... + 1793134.

Almost surely, 2^631121392 is an apocalyptic number.

It is an amenable number.

631121392 is an abundant number, since it is smaller than the sum of its proper divisors (702840104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631121392 is a wasteful number, since it uses less digits than its factorization.

631121392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585936 (or 3585930 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 631121392 is about 25122.1295275699. The cubic root of 631121392 is about 857.7702251645.

The spelling of 631121392 in words is "six hundred thirty-one million, one hundred twenty-one thousand, three hundred ninety-two".