11916689 has 2 divisors, whose sum is σ = 11916690. Its totient is φ = 11916688.

The previous prime is 11916661. The next prime is 11916703. The reversal of 11916689 is 98661911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9560464 + 2356225 = 3092^2 + 1535^2 .

It is an emirp because it is prime and its reverse (98661911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11916689 - 2⁸ = 11916433 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 (11916659) 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, 5958344 + 5958345.

It is an arithmetic number, because the mean of its divisors is an integer number (5958345).

Almost surely, 2^11916689 is an apocalyptic number.

It is an amenable number.

11916689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11916689 is an equidigital number, since it uses as much as digits as its factorization.

11916689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 41.

The square root of 11916689 is about 3452.0557643236. The cubic root of 11916689 is about 228.4117993890.

The spelling of 11916689 in words is "eleven million, nine hundred sixteen thousand, six hundred eighty-nine".