6191609 has 8 divisors (see below), whose sum is σ = 6304200. Its totient is φ = 6080256.

The previous prime is 6191597. The next prime is 6191611. The reversal of 6191609 is 9061916.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41209 + 6150400 = 203^2 + 2480^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6191609 - 2⁴ = 6191593 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 (6191629) 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, 17567 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (788025).

Almost surely, 2^6191609 is an apocalyptic number.

It is an amenable number.

6191609 is a deficient number, since it is larger than the sum of its proper divisors (112591).

6191609 is a wasteful number, since it uses less digits than its factorization.

6191609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 6191609 is about 2488.2943957659. The cubic root of 6191609 is about 183.6261410971.

The spelling of 6191609 in words is "six million, one hundred ninety-one thousand, six hundred nine".