85807859 has 2 divisors, whose sum is σ = 85807860. Its totient is φ = 85807858.

The previous prime is 85807829. The next prime is 85807861. The reversal of 85807859 is 95870858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85807859 - 2¹⁶ = 85742323 is a prime.

Together with 85807861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85807829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42903929 + 42903930.

It is an arithmetic number, because the mean of its divisors is an integer number (42903930).

Almost surely, 2^85807859 is an apocalyptic number.

85807859 is a deficient number, since it is larger than the sum of its proper divisors (1).

85807859 is an equidigital number, since it uses as much as digits as its factorization.

85807859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 50.

The square root of 85807859 is about 9263.2531542650. The cubic root of 85807859 is about 441.0715258067.

The spelling of 85807859 in words is "eighty-five million, eight hundred seven thousand, eight hundred fifty-nine".