858993859 has 2 divisors, whose sum is σ = 858993860. Its totient is φ = 858993858.

The previous prime is 858993841. The next prime is 858993917. The reversal of 858993859 is 958399858.

858993859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 858993859 - 2²⁹ = 322122947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 858993859.

It is not a weakly prime, because it can be changed into another prime (858990859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429496929 + 429496930.

It is an arithmetic number, because the mean of its divisors is an integer number (429496930).

Almost surely, 2^858993859 is an apocalyptic number.

858993859 is a deficient number, since it is larger than the sum of its proper divisors (1).

858993859 is an equidigital number, since it uses as much as digits as its factorization.

858993859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 64.

The square root of 858993859 is about 29308.5970152104. The cubic root of 858993859 is about 950.5975406022.

The spelling of 858993859 in words is "eight hundred fifty-eight million, nine hundred ninety-three thousand, eight hundred fifty-nine".