11188913 has 2 divisors, whose sum is σ = 11188914. Its totient is φ = 11188912.

The previous prime is 11188897. The next prime is 11188939. The reversal of 11188913 is 31988111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10837264 + 351649 = 3292^2 + 593^2 .

It is an emirp because it is prime and its reverse (31988111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11188913 - 2⁴ = 11188897 is a prime.

It is a Chen prime.

It is equal to p₇₃₈₁₈₅ and since 11188913 and 738185 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11188913.

It is not a weakly prime, because it can be changed into another prime (11188963) 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, 5594456 + 5594457.

It is an arithmetic number, because the mean of its divisors is an integer number (5594457).

Almost surely, 2^11188913 is an apocalyptic number.

It is an amenable number.

11188913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11188913 is an equidigital number, since it uses as much as digits as its factorization.

11188913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 32.

The square root of 11188913 is about 3344.9832585530. The cubic root of 11188913 is about 223.6639372309.

The spelling of 11188913 in words is "eleven million, one hundred eighty-eight thousand, nine hundred thirteen".