859 has 2 divisors, whose sum is σ = 860.
Its totient is φ = 858.
The previous prime is 857. The next prime is 863. The reversal of 859 is 958.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 859 - 21 = 857 is a prime.
Together with 857, it forms a pair of twin primes.
It is a plaindrome in base 7, base 14 and base 16.
It is a nialpdrome in base 11 and base 13.
It is not a weakly prime, because it can be changed into another prime (853) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429 + 430.
It is an arithmetic number, because the mean of its divisors is an integer number (430).
2859 is an apocalyptic number.
859 is a deficient number, since it is larger than the sum of its proper divisors (1).
859 is an equidigital number, since it uses as much as digits as its factorization.
859 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 360, while the sum is 22.
The square root of 859 is about 29.3087017795.
The cubic root of 859 is about 9.5059980589.
Subtracting 859 from its reverse (958), we obtain a palindrome (99).
The spelling of 859 in words is "eight hundred fifty-nine", and thus it is an aban number and an oban number.