85713239 has 4 divisors (see below), whose sum is σ = 85743840. Its totient is φ = 85682640.

The previous prime is 85713227. The next prime is 85713263. The reversal of 85713239 is 93231758.

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 85713239 - 2²⁰ = 84664663 is a prime.

It is a super-2 number, since 2×85713239² = 14693518679742242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85713209) 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, 10622 + ... + 16859.

It is an arithmetic number, because the mean of its divisors is an integer number (21435960).

Almost surely, 2^85713239 is an apocalyptic number.

85713239 is a deficient number, since it is larger than the sum of its proper divisors (30601).

85713239 is a wasteful number, since it uses less digits than its factorization.

85713239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30600.

The product of its digits is 45360, while the sum is 38.

The square root of 85713239 is about 9258.1444685207. The cubic root of 85713239 is about 440.9093435478.

The spelling of 85713239 in words is "eighty-five million, seven hundred thirteen thousand, two hundred thirty-nine".