8500009 has 8 divisors (see below), whose sum is σ = 9771840. Its totient is φ = 7242576.

The previous prime is 8500007. The next prime is 8500021. The reversal of 8500009 is 9000058.

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 8500009 - 2¹ = 8500007 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8500007) 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, 2299 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (1221480).

Almost surely, 2^8500009 is an apocalyptic number.

It is an amenable number.

8500009 is a deficient number, since it is larger than the sum of its proper divisors (1271831).

8500009 is a wasteful number, since it uses less digits than its factorization.

8500009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7199.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 8500009 is about 2915.4774909095. The cubic root of 8500009 is about 204.0828271250.

The spelling of 8500009 in words is "eight million, five hundred thousand, nine".