85599 has 6 divisors (see below), whose sum is σ = 123656. Its totient is φ = 57060.

The previous prime is 85597. The next prime is 85601. The reversal of 85599 is 99558.

It is an interprime number because it is at equal distance from previous prime (85597) and next prime (85601).

It is not a de Polignac number, because 85599 - 2¹ = 85597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 85599.

It is not an unprimeable number, because it can be changed into a prime (85597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4747 + ... + 4764.

2⁸⁵⁵⁹⁹ is an apocalyptic number.

85599 is a deficient number, since it is larger than the sum of its proper divisors (38057).

85599 is a wasteful number, since it uses less digits than its factorization.

85599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9517 (or 9514 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 85599 is about 292.5730677967. The cubic root of 85599 is about 44.0713374457.

The spelling of 85599 in words is "eighty-five thousand, five hundred ninety-nine".