679859 has 2 divisors, whose sum is σ = 679860. Its totient is φ = 679858.

The previous prime is 679843. The next prime is 679867. The reversal of 679859 is 958976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 679859 - 2⁴ = 679843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (679829) 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 as a sum of consecutive naturals, namely, 339929 + 339930.

It is an arithmetic number, because the mean of its divisors is an integer number (339930).

2⁶⁷⁹⁸⁵⁹ is an apocalyptic number.

679859 is a deficient number, since it is larger than the sum of its proper divisors (1).

679859 is an equidigital number, since it uses as much as digits as its factorization.

679859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 679859 is about 824.5356268834. The cubic root of 679859 is about 87.9305150526.

The spelling of 679859 in words is "six hundred seventy-nine thousand, eight hundred fifty-nine".