12109347 has 12 divisors (see below), whose sum is σ = 17521504. Its totient is φ = 8058960.

The previous prime is 12109343. The next prime is 12109367. The reversal of 12109347 is 74390121.

12109347 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12109347 - 2² = 12109343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12109347.

It is not an unprimeable number, because it can be changed into a prime (12109343) 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 11 ways as a sum of consecutive naturals, for example, 9222 + ... + 10452.

Almost surely, 2^12109347 is an apocalyptic number.

12109347 is a deficient number, since it is larger than the sum of its proper divisors (5412157).

12109347 is a wasteful number, since it uses less digits than its factorization.

12109347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 12109347 is about 3479.8487036077. The cubic root of 12109347 is about 229.6361417588.

Adding to 12109347 its reverse (74390121), we get a palindrome (86499468).

The spelling of 12109347 in words is "twelve million, one hundred nine thousand, three hundred forty-seven".