12189489 has 8 divisors (see below), whose sum is σ = 17502912. Its totient is φ = 7501200.

The previous prime is 12189473. The next prime is 12189491. The reversal of 12189489 is 98498121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12189489 - 2⁴ = 12189473 is a prime.

It is a super-2 number, since 2×12189489² = 297167284162242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12189489.

It is not an unprimeable number, because it can be changed into a prime (12189439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156237 + ... + 156314.

It is an arithmetic number, because the mean of its divisors is an integer number (2187864).

Almost surely, 2^12189489 is an apocalyptic number.

It is an amenable number.

12189489 is a deficient number, since it is larger than the sum of its proper divisors (5313423).

12189489 is a wasteful number, since it uses less digits than its factorization.

12189489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312567.

The product of its digits is 41472, while the sum is 42.

The square root of 12189489 is about 3491.3448698174. The cubic root of 12189489 is about 230.1416204051.

The spelling of 12189489 in words is "twelve million, one hundred eighty-nine thousand, four hundred eighty-nine".