85020539 has 4 divisors (see below), whose sum is σ = 85099560. Its totient is φ = 84941520.

The previous prime is 85020517. The next prime is 85020541. The reversal of 85020539 is 93502058.

It is a happy number.

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 85020539 - 2⁸ = 85020283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85020599) 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, 37874 + ... + 40055.

It is an arithmetic number, because the mean of its divisors is an integer number (21274890).

Almost surely, 2^85020539 is an apocalyptic number.

85020539 is a deficient number, since it is larger than the sum of its proper divisors (79021).

85020539 is a wasteful number, since it uses less digits than its factorization.

85020539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79020.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 85020539 is about 9220.6582736809. The cubic root of 85020539 is about 439.7183786715.

The spelling of 85020539 in words is "eighty-five million, twenty thousand, five hundred thirty-nine".