85209565 has 8 divisors (see below), whose sum is σ = 116858880. Its totient is φ = 58429392.

The previous prime is 85209541. The next prime is 85209583. The reversal of 85209565 is 56590258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85209565 - 2⁵ = 85209533 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1217245 + ... + 1217314.

It is an arithmetic number, because the mean of its divisors is an integer number (14607360).

Almost surely, 2^85209565 is an apocalyptic number.

It is an amenable number.

85209565 is a deficient number, since it is larger than the sum of its proper divisors (31649315).

85209565 is a wasteful number, since it uses less digits than its factorization.

85209565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434571.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 85209565 is about 9230.9027185861. The cubic root of 85209565 is about 440.0440124706.

The spelling of 85209565 in words is "eighty-five million, two hundred nine thousand, five hundred sixty-five".