681393416 has 32 divisors (see below), whose sum is σ = 1397563200. Its totient is φ = 308879040.

The previous prime is 681393403. The next prime is 681393421. The reversal of 681393416 is 614393186.

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 7 ways as a sum of consecutive naturals, for example, 22445 + ... + 43203.

It is an arithmetic number, because the mean of its divisors is an integer number (43673850).

Almost surely, 2^681393416 is an apocalyptic number.

It is an amenable number.

681393416 is an abundant number, since it is smaller than the sum of its proper divisors (716169784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681393416 is a wasteful number, since it uses less digits than its factorization.

681393416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21149 (or 21145 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 681393416 is about 26103.5134799896. The cubic root of 681393416 is about 879.9661729421.

The spelling of 681393416 in words is "six hundred eighty-one million, three hundred ninety-three thousand, four hundred sixteen".