85699 has 4 divisors (see below), whose sum is σ = 87736. Its totient is φ = 83664.

The previous prime is 85691. The next prime is 85703. The reversal of 85699 is 99658.

85699 = 117² + 118² + ... + 122².

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

It is a cyclic number.

It is not a de Polignac number, because 85699 - 2³ = 85691 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (85691) 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, 954 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (21934).

2⁸⁵⁶⁹⁹ is an apocalyptic number.

85699 is a deficient number, since it is larger than the sum of its proper divisors (2037).

85699 is a wasteful number, since it uses less digits than its factorization.

85699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its digits is 19440, while the sum is 37.

The square root of 85699 is about 292.7439153936. The cubic root of 85699 is about 44.0884927033.

It can be divided in two parts, 85 and 699, that added together give a square (784 = 28²).

The spelling of 85699 in words is "eighty-five thousand, six hundred ninety-nine".