631121394 has 8 divisors (see below), whose sum is σ = 1262242800. Its totient is φ = 210373796.

The previous prime is 631121389. The next prime is 631121411. The reversal of 631121394 is 493121136.

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

631121394 is an admirable 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, 52593444 + ... + 52593455.

It is an arithmetic number, because the mean of its divisors is an integer number (157780350).

Almost surely, 2^631121394 is an apocalyptic number.

631121394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

631121394 is a wasteful number, since it uses less digits than its factorization.

631121394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105186904.

The product of its digits is 3888, while the sum is 30.

The square root of 631121394 is about 25122.1295673755. The cubic root of 631121394 is about 857.7702260706.

The spelling of 631121394 in words is "six hundred thirty-one million, one hundred twenty-one thousand, three hundred ninety-four".