85399 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 78936.

The previous prime is 85381. The next prime is 85411. The reversal of 85399 is 99358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85399 - 2¹⁵ = 52631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

2⁸⁵³⁹⁹ is an apocalyptic number.

85399 is a deficient number, since it is larger than the sum of its proper divisors (6761).

85399 is a wasteful number, since it uses less digits than its factorization.

85399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 9720, while the sum is 34.

The square root of 85399 is about 292.2310729543. The cubic root of 85399 is about 44.0369868062.

It can be divided in two parts, 85 and 399, that added together give a palindrome (484).

The spelling of 85399 in words is "eighty-five thousand, three hundred ninety-nine".