859399243 has 2 divisors, whose sum is σ = 859399244. Its totient is φ = 859399242.

The previous prime is 859399223. The next prime is 859399271. The reversal of 859399243 is 342993958.

859399243 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 859399243 - 2¹³ = 859391051 is a prime.

It is not a weakly prime, because it can be changed into another prime (859399223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429699621 + 429699622.

It is an arithmetic number, because the mean of its divisors is an integer number (429699622).

Almost surely, 2^859399243 is an apocalyptic number.

859399243 is a deficient number, since it is larger than the sum of its proper divisors (1).

859399243 is an equidigital number, since it uses as much as digits as its factorization.

859399243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The square root of 859399243 is about 29315.5119859777. The cubic root of 859399243 is about 950.7470552252.

The spelling of 859399243 in words is "eight hundred fifty-nine million, three hundred ninety-nine thousand, two hundred forty-three".