2109193509 has 8 divisors (see below), whose sum is σ = 2822411680. Its totient is φ = 1401052176.

The previous prime is 2109193487. The next prime is 2109193561. The reversal of 2109193509 is 9053919012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2109193509 - 2⁸ = 2109193253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109197509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268239 + ... + 1269900.

It is an arithmetic number, because the mean of its divisors is an integer number (352801460).

Almost surely, 2^2109193509 is an apocalyptic number.

It is an amenable number.

2109193509 is a deficient number, since it is larger than the sum of its proper divisors (713218171).

2109193509 is a wasteful number, since it uses less digits than its factorization.

2109193509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538419.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 2109193509 is about 45925.9568109364. The cubic root of 2109193509 is about 1282.4451772940.

The spelling of 2109193509 in words is "two billion, one hundred nine million, one hundred ninety-three thousand, five hundred nine".