6617609 has 4 divisors (see below), whose sum is σ = 6628116. Its totient is φ = 6607104.

The previous prime is 6617603. The next prime is 6617627. The reversal of 6617609 is 9067166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9067166 = 2 ⋅4533583.

It can be written as a sum of positive squares in 2 ways, for example, as 2795584 + 3822025 = 1672^2 + 1955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6617609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6617603) 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 3 ways as a sum of consecutive naturals, for example, 4244 + ... + 5589.

It is an arithmetic number, because the mean of its divisors is an integer number (1657029).

Almost surely, 2^6617609 is an apocalyptic number.

It is an amenable number.

6617609 is a deficient number, since it is larger than the sum of its proper divisors (10507).

6617609 is an equidigital number, since it uses as much as digits as its factorization.

6617609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 6617609 is about 2572.4713798214. The cubic root of 6617609 is about 187.7444184314.

The spelling of 6617609 in words is "six million, six hundred seventeen thousand, six hundred nine".