85321239 has 4 divisors (see below), whose sum is σ = 113761656. Its totient is φ = 56880824.

The previous prime is 85321213. The next prime is 85321253. The reversal of 85321239 is 93212358.

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 85321239 - 2⁷ = 85321111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85321259) 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, 14220204 + ... + 14220209.

It is an arithmetic number, because the mean of its divisors is an integer number (28440414).

Almost surely, 2^85321239 is an apocalyptic number.

85321239 is a deficient number, since it is larger than the sum of its proper divisors (28440417).

85321239 is a wasteful number, since it uses less digits than its factorization.

85321239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28440416.

The product of its digits is 12960, while the sum is 33.

The square root of 85321239 is about 9236.9496588430. The cubic root of 85321239 is about 440.2361662612.

The spelling of 85321239 in words is "eighty-five million, three hundred twenty-one thousand, two hundred thirty-nine".