681307 has 8 divisors (see below), whose sum is σ = 749232. Its totient is φ = 614400.

The previous prime is 681293. The next prime is 681311. The reversal of 681307 is 703186.

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 681307 - 2⁷ = 681179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681337) 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 7 ways as a sum of consecutive naturals, for example, 2523 + ... + 2779.

It is an arithmetic number, because the mean of its divisors is an integer number (93654).

2⁶⁸¹³⁰⁷ is an apocalyptic number.

681307 is a deficient number, since it is larger than the sum of its proper divisors (67925).

681307 is a wasteful number, since it uses less digits than its factorization.

681307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 681307 is about 825.4132298431. The cubic root of 681307 is about 87.9928971540.

The spelling of 681307 in words is "six hundred eighty-one thousand, three hundred seven".