12789189 has 24 divisors (see below), whose sum is σ = 21607872. Its totient is φ = 7136640.

The previous prime is 12789187. The next prime is 12789191. The reversal of 12789189 is 98198721.

It is an interprime number because it is at equal distance from previous prime (12789187) and next prime (12789191).

It is not a de Polignac number, because 12789189 - 2¹ = 12789187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12789181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (900328).

Almost surely, 2^12789189 is an apocalyptic number.

It is an amenable number.

12789189 is a deficient number, since it is larger than the sum of its proper divisors (8818683).

12789189 is a wasteful number, since it uses less digits than its factorization.

12789189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777 (or 4774 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 12789189 is about 3576.1975616568. The cubic root of 12789189 is about 233.8555430992.

The spelling of 12789189 in words is "twelve million, seven hundred eighty-nine thousand, one hundred eighty-nine".