11155889 has 2 divisors, whose sum is σ = 11155890. Its totient is φ = 11155888.

The previous prime is 11155867. The next prime is 11155891. The reversal of 11155889 is 98855111.

It is a happy number.

11155889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11155600 + 289 = 3340^2 + 17^2 .

It is an emirp because it is prime and its reverse (98855111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11155889 - 2¹⁶ = 11090353 is a prime.

Together with 11155891, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (11155849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577944 + 5577945.

It is an arithmetic number, because the mean of its divisors is an integer number (5577945).

Almost surely, 2^11155889 is an apocalyptic number.

It is an amenable number.

11155889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155889 is an equidigital number, since it uses as much as digits as its factorization.

11155889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 38.

The square root of 11155889 is about 3340.0432631929. The cubic root of 11155889 is about 223.4436728599.

The spelling of 11155889 in words is "eleven million, one hundred fifty-five thousand, eight hundred eighty-nine".