11718689 has 2 divisors, whose sum is σ = 11718690. Its totient is φ = 11718688.

The previous prime is 11718647. The next prime is 11718691. The reversal of 11718689 is 98681711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 795664 = 3305^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 11718689 - 2⁸ = 11718433 is a prime.

Together with 11718691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11712689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859344 + 5859345.

It is an arithmetic number, because the mean of its divisors is an integer number (5859345).

Almost surely, 2^11718689 is an apocalyptic number.

It is an amenable number.

11718689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718689 is an equidigital number, since it uses as much as digits as its factorization.

11718689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 41.

The square root of 11718689 is about 3423.2570747754. The cubic root of 11718689 is about 227.1396799901.

The spelling of 11718689 in words is "eleven million, seven hundred eighteen thousand, six hundred eighty-nine".