12188929 has 4 divisors (see below), whose sum is σ = 12241476. Its totient is φ = 12136384.

The previous prime is 12188927. The next prime is 12188941. The reversal of 12188929 is 92988121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92988121 = 263 ⋅353567.

It can be written as a sum of positive squares in 2 ways, for example, as 7436529 + 4752400 = 2727^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 12188929 - 2¹ = 12188927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12188891 and 12188900.

It is not an unprimeable number, because it can be changed into a prime (12188927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25924 + ... + 26389.

It is an arithmetic number, because the mean of its divisors is an integer number (3060369).

Almost surely, 2^12188929 is an apocalyptic number.

It is an amenable number.

12188929 is a deficient number, since it is larger than the sum of its proper divisors (52547).

12188929 is an equidigital number, since it uses as much as digits as its factorization.

12188929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52546.

The product of its digits is 20736, while the sum is 40.

The square root of 12188929 is about 3491.2646705743. The cubic root of 12188929 is about 230.1380960221.

The spelling of 12188929 in words is "twelve million, one hundred eighty-eight thousand, nine hundred twenty-nine".