681933 has 12 divisors (see below), whose sum is σ = 1057920. Its totient is φ = 389592.

The previous prime is 681931. The next prime is 681943. The reversal of 681933 is 339186.

It is not a de Polignac number, because 681933 - 2¹ = 681931 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 681933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2173 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (88160).

2⁶⁸¹⁹³³ is an apocalyptic number.

It is an amenable number.

681933 is a deficient number, since it is larger than the sum of its proper divisors (375987).

681933 is a wasteful number, since it uses less digits than its factorization.

681933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656 (or 4649 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 681933 is about 825.7923467797. The cubic root of 681933 is about 88.0198388467.

The spelling of 681933 in words is "six hundred eighty-one thousand, nine hundred thirty-three".