12418189 has 4 divisors (see below), whose sum is σ = 14192224. Its totient is φ = 10644156.

The previous prime is 12418181. The next prime is 12418193. The reversal of 12418189 is 98181421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98181421 = 13 ⋅7552417.

It is a cyclic number.

It is not a de Polignac number, because 12418189 - 2³ = 12418181 is a prime.

It is a super-2 number, since 2×12418189² = 308422836079442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12418181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887007 + ... + 887020.

It is an arithmetic number, because the mean of its divisors is an integer number (3548056).

Almost surely, 2^12418189 is an apocalyptic number.

It is an amenable number.

12418189 is a deficient number, since it is larger than the sum of its proper divisors (1774035).

12418189 is an equidigital number, since it uses as much as digits as its factorization.

12418189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774034.

The product of its digits is 4608, while the sum is 34.

The square root of 12418189 is about 3523.9450903781. The cubic root of 12418189 is about 231.5720223670.

The spelling of 12418189 in words is "twelve million, four hundred eighteen thousand, one hundred eighty-nine".