12318169 has 4 divisors (see below), whose sum is σ = 12326580. Its totient is φ = 12309760.

The previous prime is 12318143. The next prime is 12318193. The reversal of 12318169 is 96181321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9078169 + 3240000 = 3013^2 + 1800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12318169 is a prime.

It is a super-2 number, since 2×12318169² = 303474575025122, which contains 22 as substring.

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 12318169.

It is not an unprimeable number, because it can be changed into a prime (12318109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (3081645).

Almost surely, 2^12318169 is an apocalyptic number.

It is an amenable number.

12318169 is a deficient number, since it is larger than the sum of its proper divisors (8411).

12318169 is an equidigital number, since it uses as much as digits as its factorization.

12318169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410.

The product of its digits is 2592, while the sum is 31.

The square root of 12318169 is about 3509.7249179957. The cubic root of 12318169 is about 230.9486277196.

The spelling of 12318169 in words is "twelve million, three hundred eighteen thousand, one hundred sixty-nine".