681306376 has 16 divisors (see below), whose sum is σ = 1283936940. Its totient is φ = 338923200.

The previous prime is 681306341. The next prime is 681306383. The reversal of 681306376 is 673603186.

It can be written as a sum of positive squares in 2 ways, for example, as 487261476 + 194044900 = 22074^2 + 13930^2 .

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, 214575 + ... + 217726.

Almost surely, 2^681306376 is an apocalyptic number.

It is an amenable number.

681306376 is a deficient number, since it is larger than the sum of its proper divisors (602630564).

681306376 is a wasteful number, since it uses less digits than its factorization.

681306376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432504 (or 432500 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 681306376 is about 26101.8462182276. The cubic root of 681306376 is about 879.9287029014.

The spelling of 681306376 in words is "six hundred eighty-one million, three hundred six thousand, three hundred seventy-six".