2659609 has 4 divisors (see below), whose sum is σ = 2696116. Its totient is φ = 2623104.

The previous prime is 2659607. The next prime is 2659621. The reversal of 2659609 is 9069562.

It is a happy number.

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 1974025 + 685584 = 1405^2 + 828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2659609 - 2¹ = 2659607 is a prime.

It is a Duffinian number.

2659609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2659607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18144 + ... + 18289.

It is an arithmetic number, because the mean of its divisors is an integer number (674029).

2^2659609 is an apocalyptic number.

It is an amenable number.

2659609 is a deficient number, since it is larger than the sum of its proper divisors (36507).

2659609 is an equidigital number, since it uses as much as digits as its factorization.

2659609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36506.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2659609 is about 1630.8307698839. The cubic root of 2659609 is about 138.5498089649.

The spelling of 2659609 in words is "two million, six hundred fifty-nine thousand, six hundred nine".