681934072 has 16 divisors (see below), whose sum is σ = 1322717400. Its totient is φ = 329209440.

The previous prime is 681934069. The next prime is 681934091. The reversal of 681934072 is 270439186.

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, 1469454 + ... + 1469917.

Almost surely, 2^681934072 is an apocalyptic number.

It is an amenable number.

681934072 is a deficient number, since it is larger than the sum of its proper divisors (640783328).

681934072 is a wasteful number, since it uses less digits than its factorization.

681934072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939406 (or 2939402 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 681934072 is about 26113.8674270970. The cubic root of 681934072 is about 880.1988496915.

The spelling of 681934072 in words is "six hundred eighty-one million, nine hundred thirty-four thousand, seventy-two".