859800871 has 2 divisors, whose sum is σ = 859800872. Its totient is φ = 859800870.

The previous prime is 859800847. The next prime is 859800899. The reversal of 859800871 is 178008958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 859800871 - 2⁵ = 859800839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859801871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429900435 + 429900436.

It is an arithmetic number, because the mean of its divisors is an integer number (429900436).

Almost surely, 2^859800871 is an apocalyptic number.

859800871 is a deficient number, since it is larger than the sum of its proper divisors (1).

859800871 is an equidigital number, since it uses as much as digits as its factorization.

859800871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 859800871 is about 29322.3612794059. The cubic root of 859800871 is about 950.8951381926.

The spelling of 859800871 in words is "eight hundred fifty-nine million, eight hundred thousand, eight hundred seventy-one".