681338 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 284640.

The previous prime is 681337. The next prime is 681341. The reversal of 681338 is 833186.

It is a self number, because there is not a number n which added to its sum of digits gives 681338.

It is a congruent number.

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, 20 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁶⁸¹³³⁸ is an apocalyptic number.

681338 is a deficient number, since it is larger than the sum of its proper divisors (516166).

681338 is a wasteful number, since it uses less digits than its factorization.

681338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its digits is 3456, while the sum is 29.

The square root of 681338 is about 825.4320081024. The cubic root of 681338 is about 87.9942317156.

The spelling of 681338 in words is "six hundred eighty-one thousand, three hundred thirty-eight".