1002011009 has 4 divisors (see below), whose sum is σ = 1009660080. Its totient is φ = 994361940.

The previous prime is 1002010981. The next prime is 1002011011. The reversal of 1002011009 is 9001102001.

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 1002011009 - 2²⁰ = 1000962433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002010984 and 1002011002.

It is not an unprimeable number, because it can be changed into a prime (1002011099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3824339 + ... + 3824600.

It is an arithmetic number, because the mean of its divisors is an integer number (252415020).

Almost surely, 2^1002011009 is an apocalyptic number.

It is an amenable number.

1002011009 is a deficient number, since it is larger than the sum of its proper divisors (7649071).

1002011009 is an equidigital number, since it uses as much as digits as its factorization.

1002011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7649070.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1002011009 is about 31654.5574759781. The cubic root of 1002011009 is about 1000.6698874839.

The spelling of 1002011009 in words is "one billion, two million, eleven thousand, nine".