681359 has 16 divisors (see below), whose sum is σ = 844800. Its totient is φ = 536544.

The previous prime is 681341. The next prime is 681361. The reversal of 681359 is 953186.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6197 + ... + 6305.

It is an arithmetic number, because the mean of its divisors is an integer number (52800).

2⁶⁸¹³⁵⁹ is an apocalyptic number.

681359 is a deficient number, since it is larger than the sum of its proper divisors (163441).

681359 is a wasteful number, since it uses less digits than its factorization.

681359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its digits is 6480, while the sum is 32.

The square root of 681359 is about 825.4447286160. Note that the first 3 decimals coincide. The cubic root of 681359 is about 87.9951357504.

The spelling of 681359 in words is "six hundred eighty-one thousand, three hundred fifty-nine".