85204039 has 4 divisors (see below), whose sum is σ = 85632400. Its totient is φ = 84775680.

The previous prime is 85204033. The next prime is 85204111. The reversal of 85204039 is 93040258.

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 85204039 - 2²¹ = 83106887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85204039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85204033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213882 + ... + 214279.

It is an arithmetic number, because the mean of its divisors is an integer number (21408100).

Almost surely, 2^85204039 is an apocalyptic number.

85204039 is a deficient number, since it is larger than the sum of its proper divisors (428361).

85204039 is a wasteful number, since it uses less digits than its factorization.

85204039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428360.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 85204039 is about 9230.6033930616. The cubic root of 85204039 is about 440.0344997053.

The spelling of 85204039 in words is "eighty-five million, two hundred four thousand, thirty-nine".