12309313 has 4 divisors (see below), whose sum is σ = 12399300. Its totient is φ = 12219328.

The previous prime is 12309299. The next prime is 12309317. The reversal of 12309313 is 31390321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31390321 = 31 ⋅1012591.

It can be written as a sum of positive squares in 2 ways, for example, as 7033104 + 5276209 = 2652^2 + 2297^2 .

It is a cyclic number.

It is not a de Polignac number, because 12309313 - 2⁹ = 12308801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12309317) 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, 44788 + ... + 45061.

It is an arithmetic number, because the mean of its divisors is an integer number (3099825).

Almost surely, 2^12309313 is an apocalyptic number.

It is an amenable number.

12309313 is a deficient number, since it is larger than the sum of its proper divisors (89987).

12309313 is an equidigital number, since it uses as much as digits as its factorization.

12309313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89986.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 12309313 is about 3508.4630538172. The cubic root of 12309313 is about 230.8932685347.

Adding to 12309313 its reverse (31390321), we get a palindrome (43699634).

The spelling of 12309313 in words is "twelve million, three hundred nine thousand, three hundred thirteen".