2009579609 has 4 divisors (see below), whose sum is σ = 2009771280. Its totient is φ = 2009387940.

The previous prime is 2009579599. The next prime is 2009579629. The reversal of 2009579609 is 9069759002.

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-2009579609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009579629) 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, 79139 + ... + 101400.

It is an arithmetic number, because the mean of its divisors is an integer number (502442820).

Almost surely, 2^2009579609 is an apocalyptic number.

It is an amenable number.

2009579609 is a deficient number, since it is larger than the sum of its proper divisors (191671).

2009579609 is a wasteful number, since it uses less digits than its factorization.

2009579609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191670.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 2009579609 is about 44828.3348898886. The cubic root of 2009579609 is about 1261.9294385416.

The spelling of 2009579609 in words is "two billion, nine million, five hundred seventy-nine thousand, six hundred nine".