12109323 has 16 divisors (see below), whose sum is σ = 16732160. Its totient is φ = 7783776.

The previous prime is 12109319. The next prime is 12109343. The reversal of 12109323 is 32390121.

It is a happy number.

It is not a de Polignac number, because 12109323 - 2² = 12109319 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 12109323.

It is not an unprimeable number, because it can be changed into a prime (12109303) 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 15 ways as a sum of consecutive naturals, for example, 13668 + ... + 14526.

It is an arithmetic number, because the mean of its divisors is an integer number (1045760).

Almost surely, 2^12109323 is an apocalyptic number.

12109323 is a deficient number, since it is larger than the sum of its proper divisors (4622837).

12109323 is a wasteful number, since it uses less digits than its factorization.

12109323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 12109323 is about 3479.8452551802. The cubic root of 12109323 is about 229.6359900504.

Adding to 12109323 its reverse (32390121), we get a palindrome (44499444).

The spelling of 12109323 in words is "twelve million, one hundred nine thousand, three hundred twenty-three".