805859 has 2 divisors, whose sum is σ = 805860. Its totient is φ = 805858.

The previous prime is 805853. The next prime is 805867. The reversal of 805859 is 958508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805859 - 2⁴ = 805843 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805859.

It is not a weakly prime, because it can be changed into another prime (805853) 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 as a sum of consecutive naturals, namely, 402929 + 402930.

It is an arithmetic number, because the mean of its divisors is an integer number (402930).

2⁸⁰⁵⁸⁵⁹ is an apocalyptic number.

805859 is a deficient number, since it is larger than the sum of its proper divisors (1).

805859 is an equidigital number, since it uses as much as digits as its factorization.

805859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 805859 is about 897.6964965956. The cubic root of 805859 is about 93.0578512375.

The spelling of 805859 in words is "eight hundred five thousand, eight hundred fifty-nine".