859899 has 4 divisors (see below), whose sum is σ = 1146536. Its totient is φ = 573264.

The previous prime is 859891. The next prime is 859913. The reversal of 859899 is 998958.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 859899 - 2³ = 859891 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143314 + ... + 143319.

It is an arithmetic number, because the mean of its divisors is an integer number (286634).

2⁸⁵⁹⁸⁹⁹ is an apocalyptic number.

859899 is a deficient number, since it is larger than the sum of its proper divisors (286637).

859899 is a wasteful number, since it uses less digits than its factorization.

859899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286636.

The product of its digits is 233280, while the sum is 48.

The square root of 859899 is about 927.3073924002. The cubic root of 859899 is about 95.0931312010.

The spelling of 859899 in words is "eight hundred fifty-nine thousand, eight hundred ninety-nine".