11047609 has 4 divisors (see below), whose sum is σ = 11055604. Its totient is φ = 11039616.

The previous prime is 11047583. The next prime is 11047627. The reversal of 11047609 is 90674011.

11047609 is digitally balanced in base 3, 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90674011 = 277 ⋅327343.

It can be written as a sum of positive squares in 2 ways, for example, as 6906384 + 4141225 = 2628^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 11047609 - 2⁵ = 11047577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11047639) 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, 1332 + ... + 4885.

It is an arithmetic number, because the mean of its divisors is an integer number (2763901).

Almost surely, 2^11047609 is an apocalyptic number.

11047609 is the 1777-th nonagonal number.

It is an amenable number.

11047609 is a deficient number, since it is larger than the sum of its proper divisors (7995).

11047609 is an equidigital number, since it uses as much as digits as its factorization.

11047609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 11047609 is about 3323.7943678874. The cubic root of 11047609 is about 222.7184002069.

The spelling of 11047609 in words is "eleven million, forty-seven thousand, six hundred nine".