681873 has 8 divisors (see below), whose sum is σ = 933888. Its totient is φ = 442224.

The previous prime is 681841. The next prime is 681883. The reversal of 681873 is 378186.

681873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 681873 - 2⁵ = 681841 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6 + 8 + 8⁵ + 1 + 7⁶ + 3¹² .

It is not an unprimeable number, because it can be changed into a prime (681823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961 + ... + 3182.

It is an arithmetic number, because the mean of its divisors is an integer number (116736).

2⁶⁸¹⁸⁷³ is an apocalyptic number.

It is an amenable number.

681873 is a deficient number, since it is larger than the sum of its proper divisors (252015).

681873 is a wasteful number, since it uses less digits than its factorization.

681873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183.

The product of its digits is 8064, while the sum is 33.

The square root of 681873 is about 825.7560172351. The cubic root of 681873 is about 88.0172572905.

The spelling of 681873 in words is "six hundred eighty-one thousand, eight hundred seventy-three".