681711 has 8 divisors (see below), whose sum is σ = 913920. Its totient is φ = 451992.

The previous prime is 681689. The next prime is 681719. The reversal of 681711 is 117186.

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

It is not a de Polignac number, because 681711 - 2⁶ = 681647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (114240).

2⁶⁸¹⁷¹¹ is an apocalyptic number.

681711 is a deficient number, since it is larger than the sum of its proper divisors (232209).

681711 is a wasteful number, since it uses less digits than its factorization.

681711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245.

The product of its digits is 336, while the sum is 24.

The square root of 681711 is about 825.6579194800. The cubic root of 681711 is about 88.0102863320.

Adding to 681711 its reverse (117186), we get a palindrome (798897).

The spelling of 681711 in words is "six hundred eighty-one thousand, seven hundred eleven".