11565089 has 2 divisors, whose sum is σ = 11565090. Its totient is φ = 11565088.

The previous prime is 11565079. The next prime is 11565097. The reversal of 11565089 is 98056511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 1420864 = 3185^2 + 1192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11565089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11565079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782544 + 5782545.

It is an arithmetic number, because the mean of its divisors is an integer number (5782545).

Almost surely, 2^11565089 is an apocalyptic number.

It is an amenable number.

11565089 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565089 is an equidigital number, since it uses as much as digits as its factorization.

11565089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 11565089 is about 3400.7483000069. The cubic root of 11565089 is about 226.1429187121.

The spelling of 11565089 in words is "eleven million, five hundred sixty-five thousand, eighty-nine".