85710239 has 4 divisors (see below), whose sum is σ = 85735200. Its totient is φ = 85685280.

The previous prime is 85710217. The next prime is 85710253. The reversal of 85710239 is 93201758.

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 85710239 - 2²⁴ = 68933023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85710199 and 85710208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85710299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6314 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (21433800).

Almost surely, 2^85710239 is an apocalyptic number.

85710239 is a deficient number, since it is larger than the sum of its proper divisors (24961).

85710239 is a wasteful number, since it uses less digits than its factorization.

85710239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24960.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 85710239 is about 9257.9824475962. The cubic root of 85710239 is about 440.9041994826.

The spelling of 85710239 in words is "eighty-five million, seven hundred ten thousand, two hundred thirty-nine".