800988009 has 4 divisors (see below), whose sum is σ = 1067984016. Its totient is φ = 533992004.

The previous prime is 800987989. The next prime is 800988017. The reversal of 800988009 is 900889008.

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 not a de Polignac number, because 800988009 - 2⁵ = 800987977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (800988029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133497999 + ... + 133498004.

It is an arithmetic number, because the mean of its divisors is an integer number (266996004).

Almost surely, 2^800988009 is an apocalyptic number.

It is an amenable number.

800988009 is a deficient number, since it is larger than the sum of its proper divisors (266996007).

800988009 is a wasteful number, since it uses less digits than its factorization.

800988009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266996006.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 800988009 is about 28301.7315548007. The cubic root of 800988009 is about 928.6997704679.

Subtracting 800988009 from its reverse (900889008), we obtain a palindrome (99900999).

The spelling of 800988009 in words is "eight hundred million, nine hundred eighty-eight thousand, nine".