85239911 has 4 divisors (see below), whose sum is σ = 85260000. Its totient is φ = 85219824.

The previous prime is 85239907. The next prime is 85239923. The reversal of 85239911 is 11993258.

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 85239911 - 2² = 85239907 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 (85239901) 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, 911 + ... + 13088.

It is an arithmetic number, because the mean of its divisors is an integer number (21315000).

Almost surely, 2^85239911 is an apocalyptic number.

85239911 is a deficient number, since it is larger than the sum of its proper divisors (20089).

85239911 is a wasteful number, since it uses less digits than its factorization.

85239911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20088.

The product of its digits is 19440, while the sum is 38.

The square root of 85239911 is about 9232.5462901629. The cubic root of 85239911 is about 440.0962444421.

The spelling of 85239911 in words is "eighty-five million, two hundred thirty-nine thousand, nine hundred eleven".