681392 has 20 divisors (see below), whose sum is σ = 1357056. Its totient is φ = 331200.

The previous prime is 681371. The next prime is 681403. The reversal of 681392 is 293186.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681392.

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, 17 + ... + 1167.

2⁶⁸¹³⁹² is an apocalyptic number.

It is an amenable number.

681392 is a deficient number, since it is larger than the sum of its proper divisors (675664).

681392 is a wasteful number, since it uses less digits than its factorization.

681392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1190 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 681392 is about 825.4647175985. The cubic root of 681392 is about 87.9965563391.

The spelling of 681392 in words is "six hundred eighty-one thousand, three hundred ninety-two".