11531189 has 4 divisors (see below), whose sum is σ = 11538924. Its totient is φ = 11523456.

The previous prime is 11531173. The next prime is 11531197. The reversal of 11531189 is 98113511.

11531189 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8352100 + 3179089 = 2890^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 11531189 - 2⁴ = 11531173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11591189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (2884731).

Almost surely, 2^11531189 is an apocalyptic number.

It is an amenable number.

11531189 is a deficient number, since it is larger than the sum of its proper divisors (7735).

11531189 is an equidigital number, since it uses as much as digits as its factorization.

11531189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734.

The product of its digits is 1080, while the sum is 29.

The square root of 11531189 is about 3395.7604450255. The cubic root of 11531189 is about 225.9217430777.

The spelling of 11531189 in words is "eleven million, five hundred thirty-one thousand, one hundred eighty-nine".