11765609 has 2 divisors, whose sum is σ = 11765610. Its totient is φ = 11765608.

The previous prime is 11765599. The next prime is 11765641. The reversal of 11765609 is 90656711.

11765609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8970025 + 2795584 = 2995^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 11765609 - 2⁸ = 11765353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₇₇₃₆₃₉ and since 11765609 and 773639 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11765659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5882804 + 5882805.

It is an arithmetic number, because the mean of its divisors is an integer number (5882805).

Almost surely, 2^11765609 is an apocalyptic number.

It is an amenable number.

11765609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11765609 is an equidigital number, since it uses as much as digits as its factorization.

11765609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 11765609 is about 3430.1033512126. The cubic root of 11765609 is about 227.4424215273.

The spelling of 11765609 in words is "eleven million, seven hundred sixty-five thousand, six hundred nine".