85899 has 16 divisors (see below), whose sum is σ = 132480. Its totient is φ = 48960.

The previous prime is 85889. The next prime is 85903. The reversal of 85899 is 99858.

It is not a de Polignac number, because 85899 - 2⁸ = 85643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85819) 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, 559 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (8280).

2⁸⁵⁸⁹⁹ is an apocalyptic number.

85899 is a deficient number, since it is larger than the sum of its proper divisors (46581).

85899 is a wasteful number, since it uses less digits than its factorization.

85899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170.

The product of its digits is 25920, while the sum is 39.

The square root of 85899 is about 293.0853118121. The cubic root of 85899 is about 44.1227632237.

The spelling of 85899 in words is "eighty-five thousand, eight hundred ninety-nine".