11665789 has 2 divisors, whose sum is σ = 11665790. Its totient is φ = 11665788.

The previous prime is 11665783. The next prime is 11665813. The reversal of 11665789 is 98756611.

It is a happy number.

11665789 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., 9504889 + 2160900 = 3083^2 + 1470^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665789 - 2¹⁷ = 11534717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11665783) 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 as a sum of consecutive naturals, namely, 5832894 + 5832895.

It is an arithmetic number, because the mean of its divisors is an integer number (5832895).

Almost surely, 2^11665789 is an apocalyptic number.

It is an amenable number.

11665789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665789 is an equidigital number, since it uses as much as digits as its factorization.

11665789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 11665789 is about 3415.5217756589. The cubic root of 11665789 is about 226.7973830322.

The spelling of 11665789 in words is "eleven million, six hundred sixty-five thousand, seven hundred eighty-nine".