681971596 has 12 divisors (see below), whose sum is σ = 1193648848. Its totient is φ = 340929072.

The previous prime is 681971593. The next prime is 681971639. The reversal of 681971596 is 695179186.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (681971593) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24730 + ... + 44446.

Almost surely, 2^681971596 is an apocalyptic number.

It is an amenable number.

681971596 is a deficient number, since it is larger than the sum of its proper divisors (511677252).

681971596 is a wasteful number, since it uses less digits than its factorization.

681971596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28368 (or 28366 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The square root of 681971596 is about 26114.5858860523. The cubic root of 681971596 is about 880.2149939579.

The spelling of 681971596 in words is "six hundred eighty-one million, nine hundred seventy-one thousand, five hundred ninety-six".