85739 has 4 divisors (see below), whose sum is σ = 86856. Its totient is φ = 84624.

The previous prime is 85733. The next prime is 85751. The reversal of 85739 is 93758.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85739 is a prime.

It is a super-2 number, since 2×85739² = 14702352242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85733) 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 3 ways as a sum of consecutive naturals, for example, 434 + ... + 599.

It is an arithmetic number, because the mean of its divisors is an integer number (21714).

2⁸⁵⁷³⁹ is an apocalyptic number.

85739 is a deficient number, since it is larger than the sum of its proper divisors (1117).

85739 is a wasteful number, since it uses less digits than its factorization.

85739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its digits is 7560, while the sum is 32.

The square root of 85739 is about 292.8122265207. The cubic root of 85739 is about 44.0953510696.

The spelling of 85739 in words is "eighty-five thousand, seven hundred thirty-nine".