2002011009 has 4 divisors (see below), whose sum is σ = 2669348016. Its totient is φ = 1334674004.

The previous prime is 2002011007. The next prime is 2002011041. The reversal of 2002011009 is 9001102002.

It is a happy number.

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 2002011009 - 2¹ = 2002011007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2002011007) 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, 333668499 + ... + 333668504.

It is an arithmetic number, because the mean of its divisors is an integer number (667337004).

Almost surely, 2^2002011009 is an apocalyptic number.

It is an amenable number.

2002011009 is a deficient number, since it is larger than the sum of its proper divisors (667337007).

2002011009 is an equidigital number, since it uses as much as digits as its factorization.

2002011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667337006.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2002011009 is about 44743.8376650908. The cubic root of 2002011009 is about 1260.3431938657.

The spelling of 2002011009 in words is "two billion, two million, eleven thousand, nine".