2109240009 has 12 divisors (see below), whose sum is σ = 3111503616. Its totient is φ = 1376241432.

The previous prime is 2109239987. The next prime is 2109240017. The reversal of 2109240009 is 9000429012.

It is not a de Polignac number, because 2109240009 - 2⁸ = 2109239753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2109240059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2492769 + ... + 2493614.

It is an arithmetic number, because the mean of its divisors is an integer number (259291968).

Almost surely, 2^2109240009 is an apocalyptic number.

It is an amenable number.

2109240009 is a deficient number, since it is larger than the sum of its proper divisors (1002263607).

2109240009 is a wasteful number, since it uses less digits than its factorization.

2109240009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986436 (or 4986433 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2109240009 is about 45926.4630578058. The cubic root of 2109240009 is about 1282.4546016327.

The spelling of 2109240009 in words is "two billion, one hundred nine million, two hundred forty thousand, nine".