8000008009 has 4 divisors (see below), whose sum is σ = 9142866304. Its totient is φ = 6857149716.

The previous prime is 8000007997. The next prime is 8000008111. The reversal of 8000008009 is 9008000008.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8000008009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8000008609) 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, 571429137 + ... + 571429150.

It is an arithmetic number, because the mean of its divisors is an integer number (2285716576).

Almost surely, 2^8000008009 is an apocalyptic number.

It is an amenable number.

8000008009 is a deficient number, since it is larger than the sum of its proper divisors (1142858295).

8000008009 is a wasteful number, since it uses less digits than its factorization.

8000008009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142858294.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 8000008009 is about 89442.7638716515. The cubic root of 8000008009 is about 2000.0006674164. Note that the first 3 decimals are identical.

The spelling of 8000008009 in words is "eight billion, eight thousand, nine".