11881189 has 4 divisors (see below), whose sum is σ = 11923456. Its totient is φ = 11838924.

The previous prime is 11881157. The next prime is 11881193. The reversal of 11881189 is 98118811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11881189 - 2⁵ = 11881157 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 (11881489) 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 in 3 ways as a sum of consecutive naturals, for example, 20709 + ... + 21274.

It is an arithmetic number, because the mean of its divisors is an integer number (2980864).

Almost surely, 2^11881189 is an apocalyptic number.

It is an amenable number.

11881189 is a deficient number, since it is larger than the sum of its proper divisors (42267).

11881189 is an equidigital number, since it uses as much as digits as its factorization.

11881189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42266.

The product of its digits is 4608, while the sum is 37.

The square root of 11881189 is about 3446.9100655515. The cubic root of 11881189 is about 228.1847596989.

The spelling of 11881189 in words is "eleven million, eight hundred eighty-one thousand, one hundred eighty-nine".