850664859 has 16 divisors (see below), whose sum is σ = 1279998720. Its totient is φ = 497776160.

The previous prime is 850664851. The next prime is 850664863. The reversal of 850664859 is 958466058.

It is a cyclic number.

It is not a de Polignac number, because 850664859 - 2³ = 850664851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (850664851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443487 + ... + 445400.

It is an arithmetic number, because the mean of its divisors is an integer number (79999920).

Almost surely, 2^850664859 is an apocalyptic number.

850664859 is a deficient number, since it is larger than the sum of its proper divisors (429333861).

850664859 is a wasteful number, since it uses less digits than its factorization.

850664859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888930.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The square root of 850664859 is about 29166.1594832093. The cubic root of 850664859 is about 947.5151531377.

The spelling of 850664859 in words is "eight hundred fifty million, six hundred sixty-four thousand, eight hundred fifty-nine".