11965189 has 4 divisors (see below), whose sum is σ = 12026124. Its totient is φ = 11904256.

The previous prime is 11965181. The next prime is 11965207. The reversal of 11965189 is 98156911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98156911 = 41 ⋅2394071.

It can be written as a sum of positive squares in 2 ways, for example, as 10452289 + 1512900 = 3233^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 11965189 - 2³ = 11965181 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30172 + ... + 30565.

It is an arithmetic number, because the mean of its divisors is an integer number (3006531).

Almost surely, 2^11965189 is an apocalyptic number.

It is an amenable number.

11965189 is a deficient number, since it is larger than the sum of its proper divisors (60935).

11965189 is an equidigital number, since it uses as much as digits as its factorization.

11965189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60934.

The product of its digits is 19440, while the sum is 40.

The square root of 11965189 is about 3459.0734308482. The cubic root of 11965189 is about 228.7212527204.

The spelling of 11965189 in words is "eleven million, nine hundred sixty-five thousand, one hundred eighty-nine".