681790696 has 16 divisors (see below), whose sum is σ = 1322439300. Its totient is φ = 329140224.

The previous prime is 681790673. The next prime is 681790723. The reversal of 681790696 is 696097186.

It can be written as a sum of positive squares in 2 ways, for example, as 676728196 + 5062500 = 26014^2 + 2250^2 .

It is an unprimeable number.

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, 1469145 + ... + 1469608.

Almost surely, 2^681790696 is an apocalyptic number.

It is an amenable number.

681790696 is a deficient number, since it is larger than the sum of its proper divisors (640648604).

681790696 is a wasteful number, since it uses less digits than its factorization.

681790696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938788 (or 2938784 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 681790696 is about 26111.1220747022. The cubic root of 681790696 is about 880.1371583732.

The spelling of 681790696 in words is "six hundred eighty-one million, seven hundred ninety thousand, six hundred ninety-six".