12168889 has 4 divisors (see below), whose sum is σ = 12884724. Its totient is φ = 11453056.

The previous prime is 12168883. The next prime is 12168901. The reversal of 12168889 is 98886121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11002489 + 1166400 = 3317^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 12168889 - 2¹¹ = 12166841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12168883) 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, 357892 + ... + 357925.

It is an arithmetic number, because the mean of its divisors is an integer number (3221181).

Almost surely, 2^12168889 is an apocalyptic number.

It is an amenable number.

12168889 is a deficient number, since it is larger than the sum of its proper divisors (715835).

12168889 is an equidigital number, since it uses as much as digits as its factorization.

12168889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715834.

The product of its digits is 55296, while the sum is 43.

The square root of 12168889 is about 3488.3934697795. The cubic root of 12168889 is about 230.0119023456.

The spelling of 12168889 in words is "twelve million, one hundred sixty-eight thousand, eight hundred eighty-nine".