681877 has 8 divisors (see below), whose sum is σ = 806400. Its totient is φ = 564144.

The previous prime is 681841. The next prime is 681883. The reversal of 681877 is 778186.

It is a happy number.

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

It is not a de Polignac number, because 681877 - 2¹¹ = 679829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681677) 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, 1477 + ... + 1882.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2⁶⁸¹⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

681877 is a deficient number, since it is larger than the sum of its proper divisors (124523).

681877 is a wasteful number, since it uses less digits than its factorization.

681877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its digits is 18816, while the sum is 37.

The square root of 681877 is about 825.7584392545. The cubic root of 681877 is about 88.0174293989.

The spelling of 681877 in words is "six hundred eighty-one thousand, eight hundred seventy-seven".