681373 has 8 divisors (see below), whose sum is σ = 849600. Its totient is φ = 530880.

The previous prime is 681371. The next prime is 681403. The reversal of 681373 is 373186.

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

It is not a de Polignac number, because 681373 - 2¹ = 681371 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 (681371) 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, 4348 + ... + 4501.

It is an arithmetic number, because the mean of its divisors is an integer number (106200).

2⁶⁸¹³⁷³ is an apocalyptic number.

It is an amenable number.

681373 is a deficient number, since it is larger than the sum of its proper divisors (168227).

681373 is a wasteful number, since it uses less digits than its factorization.

681373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8867.

The product of its digits is 3024, while the sum is 28.

The square root of 681373 is about 825.4532088495. The cubic root of 681373 is about 87.9957384300.

It can be divided in two parts, 6813 and 73, that added together give a palindrome (6886).

The spelling of 681373 in words is "six hundred eighty-one thousand, three hundred seventy-three".