8445009 has 4 divisors (see below), whose sum is σ = 11260016. Its totient is φ = 5630004.

The previous prime is 8444983. The next prime is 8445013. The reversal of 8445009 is 9005448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8445009 - 2¹⁵ = 8412241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8445029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407499 + ... + 1407504.

It is an arithmetic number, because the mean of its divisors is an integer number (2815004).

Almost surely, 2^8445009 is an apocalyptic number.

It is an amenable number.

8445009 is a deficient number, since it is larger than the sum of its proper divisors (2815007).

8445009 is a wasteful number, since it uses less digits than its factorization.

8445009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815006.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8445009 is about 2906.0297658489. The cubic root of 8445009 is about 203.6416961138.

The spelling of 8445009 in words is "eight million, four hundred forty-five thousand, nine".