681317 has 8 divisors (see below), whose sum is σ = 838656. Its totient is φ = 538992.

The previous prime is 681311. The next prime is 681337. The reversal of 681317 is 713186.

681317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681317 - 2⁶ = 681253 is a prime.

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 681317.

It is not an unprimeable number, because it can be changed into a prime (681311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653 + ... + 3834.

It is an arithmetic number, because the mean of its divisors is an integer number (104832).

2⁶⁸¹³¹⁷ is an apocalyptic number.

It is an amenable number.

681317 is a deficient number, since it is larger than the sum of its proper divisors (157339).

681317 is a wasteful number, since it uses less digits than its factorization.

681317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507.

The product of its digits is 1008, while the sum is 26.

The square root of 681317 is about 825.4192873928. The cubic root of 681317 is about 87.9933276621.

The spelling of 681317 in words is "six hundred eighty-one thousand, three hundred seventeen".