680879 has 2 divisors, whose sum is σ = 680880. Its totient is φ = 680878.

The previous prime is 680873. The next prime is 680881. The reversal of 680879 is 978086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680879 - 2⁸ = 680623 is a prime.

Together with 680881, it forms a pair of twin primes.

It is a Chen prime.

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 680879.

It is not a weakly prime, because it can be changed into another prime (680873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340439 + 340440.

It is an arithmetic number, because the mean of its divisors is an integer number (340440).

2⁶⁸⁰⁸⁷⁹ is an apocalyptic number.

680879 is a deficient number, since it is larger than the sum of its proper divisors (1).

680879 is an equidigital number, since it uses as much as digits as its factorization.

680879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 680879 is about 825.1539250346. The cubic root of 680879 is about 87.9744674549.

The spelling of 680879 in words is "six hundred eighty thousand, eight hundred seventy-nine".