12188939 has 8 divisors (see below), whose sum is σ = 13951488. Its totient is φ = 10431720.

The previous prime is 12188927. The next prime is 12188941. The reversal of 12188939 is 93988121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12188939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12188896 and 12188905.

It is not an unprimeable number, because it can be changed into a prime (12188999) 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, 7454 + ... + 8940.

It is an arithmetic number, because the mean of its divisors is an integer number (1743936).

Almost surely, 2^12188939 is an apocalyptic number.

12188939 is a deficient number, since it is larger than the sum of its proper divisors (1762549).

12188939 is a wasteful number, since it uses less digits than its factorization.

12188939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665.

The product of its digits is 31104, while the sum is 41.

The square root of 12188939 is about 3491.2661027198. The cubic root of 12188939 is about 230.1381589585.

The spelling of 12188939 in words is "twelve million, one hundred eighty-eight thousand, nine hundred thirty-nine".