680871 has 8 divisors (see below), whose sum is σ = 920560. Its totient is φ = 447552.

The previous prime is 680861. The next prime is 680873. The reversal of 680871 is 178086.

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

It is not a de Polignac number, because 680871 - 2¹¹ = 678823 is a prime.

It is a Duffinian number.

680871 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680871.

It is not an unprimeable number, because it can be changed into a prime (680873) 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, 1336 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (115070).

2⁶⁸⁰⁸⁷¹ is an apocalyptic number.

680871 is a deficient number, since it is larger than the sum of its proper divisors (239689).

680871 is a wasteful number, since it uses less digits than its factorization.

680871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 680871 is about 825.1490774399. The cubic root of 680871 is about 87.9741229010.

It can be divided in two parts, 680 and 871, that added together give a palindrome (1551).

The spelling of 680871 in words is "six hundred eighty thousand, eight hundred seventy-one".