680881 has 2 divisors, whose sum is σ = 680882. Its totient is φ = 680880.

The previous prime is 680879. The next prime is 680917. The reversal of 680881 is 188086.

680881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 256 = 825^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 680881 - 2¹ = 680879 is a prime.

It is a super-2 number, since 2×680881² = 927197872322, which contains 22 as substring.

Together with 680879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (680831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340440 + 340441.

It is an arithmetic number, because the mean of its divisors is an integer number (340441).

2⁶⁸⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

680881 is a deficient number, since it is larger than the sum of its proper divisors (1).

680881 is an equidigital number, since it uses as much as digits as its factorization.

680881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 680881 is about 825.1551369288. The cubic root of 680881 is about 87.9745535929.

It can be divided in two parts, 6808 and 81, that added together give a square (6889 = 83²).

The spelling of 680881 in words is "six hundred eighty thousand, eight hundred eighty-one".