85384709 has 4 divisors (see below), whose sum is σ = 85535340. Its totient is φ = 85234080.

The previous prime is 85384703. The next prime is 85384751. The reversal of 85384709 is 90748358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45024100 + 40360609 = 6710^2 + 6353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85384709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85384709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85384703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74462 + ... + 75599.

It is an arithmetic number, because the mean of its divisors is an integer number (21383835).

Almost surely, 2^85384709 is an apocalyptic number.

It is an amenable number.

85384709 is a deficient number, since it is larger than the sum of its proper divisors (150631).

85384709 is a wasteful number, since it uses less digits than its factorization.

85384709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150630.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 85384709 is about 9240.3846781398. The cubic root of 85384709 is about 440.3453022906.

The spelling of 85384709 in words is "eighty-five million, three hundred eighty-four thousand, seven hundred nine".