2311609 has 4 divisors (see below), whose sum is σ = 2447604. Its totient is φ = 2175616.

The previous prime is 2311591. The next prime is 2311613. The reversal of 2311609 is 9061132.

2311609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1951609 + 360000 = 1397^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311609 - 2¹⁷ = 2180537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2311609.

It is not an unprimeable number, because it can be changed into a prime (2311669) 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, 67972 + ... + 68005.

It is an arithmetic number, because the mean of its divisors is an integer number (611901).

2^2311609 is an apocalyptic number.

It is an amenable number.

2311609 is a deficient number, since it is larger than the sum of its proper divisors (135995).

2311609 is a wasteful number, since it uses less digits than its factorization.

2311609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135994.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2311609 is about 1520.3976453547. The cubic root of 2311609 is about 132.2223258191. Note that the first 3 decimals are identical.

The spelling of 2311609 in words is "two million, three hundred eleven thousand, six hundred nine".