12986189 has 4 divisors (see below), whose sum is σ = 13164156. Its totient is φ = 12808224.

The previous prime is 12986153. The next prime is 12986203. The reversal of 12986189 is 98168921.

12986189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4818025 + 8168164 = 2195^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 12986189 - 2¹⁶ = 12920653 is a prime.

It is a super-2 number, since 2×12986189² = 337282209487442, 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 (12986089) 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, 88874 + ... + 89019.

It is an arithmetic number, because the mean of its divisors is an integer number (3291039).

Almost surely, 2^12986189 is an apocalyptic number.

It is an amenable number.

12986189 is a deficient number, since it is larger than the sum of its proper divisors (177967).

12986189 is an equidigital number, since it uses as much as digits as its factorization.

12986189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177966.

The product of its digits is 62208, while the sum is 44.

The square root of 12986189 is about 3603.6355254104. The cubic root of 12986189 is about 235.0501718741.

The spelling of 12986189 in words is "twelve million, nine hundred eighty-six thousand, one hundred eighty-nine".