6109209 has 8 divisors (see below), whose sum is σ = 9050720. Its totient is φ = 4072788.

The previous prime is 6109199. The next prime is 6109217. The reversal of 6109209 is 9029016.

It is a happy number.

It is not a de Polignac number, because 6109209 - 2¹⁹ = 5584921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 226267 = 6109209 / (6 + 1 + 0 + 9 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6109219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113107 + ... + 113160.

It is an arithmetic number, because the mean of its divisors is an integer number (1131340).

Almost surely, 2^6109209 is an apocalyptic number.

It is an amenable number.

6109209 is a deficient number, since it is larger than the sum of its proper divisors (2941511).

6109209 is a wasteful number, since it uses less digits than its factorization.

6109209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226276 (or 226270 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 6109209 is about 2471.6814115092. The cubic root of 6109209 is about 182.8079145464.

The spelling of 6109209 in words is "six million, one hundred nine thousand, two hundred nine".