9085217809 has 8 divisors (see below), whose sum is σ = 9650579328. Its totient is φ = 8523293760.

The previous prime is 9085217807. The next prime is 9085217849. The reversal of 9085217809 is 9087125809.

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

It is a cyclic number.

It is not a de Polignac number, because 9085217809 - 2¹ = 9085217807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9085217807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853917 + ... + 864490.

It is an arithmetic number, because the mean of its divisors is an integer number (1206322416).

Almost surely, 2^9085217809 is an apocalyptic number.

It is an amenable number.

9085217809 is a deficient number, since it is larger than the sum of its proper divisors (565361519).

9085217809 is a wasteful number, since it uses less digits than its factorization.

9085217809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718735.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 9085217809 is about 95316.4089178773. The cubic root of 9085217809 is about 2086.6284022824.

The spelling of 9085217809 in words is "nine billion, eighty-five million, two hundred seventeen thousand, eight hundred nine".