681308 has 6 divisors (see below), whose sum is σ = 1192296. Its totient is φ = 340652.

The previous prime is 681293. The next prime is 681311. The reversal of 681308 is 803186.

681308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85160 + ... + 85167.

It is an arithmetic number, because the mean of its divisors is an integer number (198716).

2⁶⁸¹³⁰⁸ is an apocalyptic number.

It is an amenable number.

681308 is a deficient number, since it is larger than the sum of its proper divisors (510988).

681308 is a wasteful number, since it uses less digits than its factorization.

681308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170331 (or 170329 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 681308 is about 825.4138356001. The cubic root of 681308 is about 87.9929402050.

It can be divided in two parts, 681 and 308, that added together give a palindrome (989).

The spelling of 681308 in words is "six hundred eighty-one thousand, three hundred eight".