6140809 has 4 divisors (see below), whose sum is σ = 6241540. Its totient is φ = 6040080.

The previous prime is 6140807. The next prime is 6140843. The reversal of 6140809 is 9080416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2890000 + 3250809 = 1700^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 6140809 - 2¹ = 6140807 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 (6140803) 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, 50274 + ... + 50395.

It is an arithmetic number, because the mean of its divisors is an integer number (1560385).

Almost surely, 2^6140809 is an apocalyptic number.

It is an amenable number.

6140809 is a deficient number, since it is larger than the sum of its proper divisors (100731).

6140809 is a wasteful number, since it uses less digits than its factorization.

6140809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100730.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6140809 is about 2478.0655762106. The cubic root of 6140809 is about 183.1225651305.

The spelling of 6140809 in words is "six million, one hundred forty thousand, eight hundred nine".