85050209 has 4 divisors (see below), whose sum is σ = 85179540. Its totient is φ = 84920880.

The previous prime is 85050179. The next prime is 85050221. The reversal of 85050209 is 90205058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90205058 = 2 ⋅45102529.

It can be written as a sum of positive squares in 2 ways, for example, as 25806400 + 59243809 = 5080^2 + 7697^2 .

It is a cyclic number.

It is not a de Polignac number, because 85050209 - 2¹⁶ = 84984673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85050299) 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, 63674 + ... + 64995.

It is an arithmetic number, because the mean of its divisors is an integer number (21294885).

Almost surely, 2^85050209 is an apocalyptic number.

It is an amenable number.

85050209 is a deficient number, since it is larger than the sum of its proper divisors (129331).

85050209 is a wasteful number, since it uses less digits than its factorization.

85050209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129330.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 85050209 is about 9222.2670206409. The cubic root of 85050209 is about 439.7695228895.

The spelling of 85050209 in words is "eighty-five million, fifty thousand, two hundred nine".