6109809 has 4 divisors (see below), whose sum is σ = 8146416. Its totient is φ = 4073204.

The previous prime is 6109799. The next prime is 6109813. The reversal of 6109809 is 9089016.

It is a happy number.

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 6109809 - 2¹² = 6105713 is a prime.

It is a D-number.

It is a Curzon number.

6109809 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6109809.

It is not an unprimeable number, because it can be changed into a prime (6109819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018299 + ... + 1018304.

It is an arithmetic number, because the mean of its divisors is an integer number (2036604).

Almost surely, 2^6109809 is an apocalyptic number.

It is an amenable number.

6109809 is a deficient number, since it is larger than the sum of its proper divisors (2036607).

6109809 is a wasteful number, since it uses less digits than its factorization.

6109809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036606.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 6109809 is about 2471.8027833951. The cubic root of 6109809 is about 182.8138990177.

The spelling of 6109809 in words is "six million, one hundred nine thousand, eight hundred nine".