681194872 has 16 divisors (see below), whose sum is σ = 1279182600. Its totient is φ = 340079520.

The previous prime is 681194791. The next prime is 681194893. The reversal of 681194872 is 278491186.

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, 59122 + ... + 69697.

Almost surely, 2^681194872 is an apocalyptic number.

It is an amenable number.

681194872 is a deficient number, since it is larger than the sum of its proper divisors (597987728).

681194872 is a wasteful number, since it uses less digits than its factorization.

681194872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129486 (or 129482 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 681194872 is about 26099.7101899619. The cubic root of 681194872 is about 879.8806966365.

The spelling of 681194872 in words is "six hundred eighty-one million, one hundred ninety-four thousand, eight hundred seventy-two".