13309243 has 2 divisors, whose sum is σ = 13309244. Its totient is φ = 13309242.

The previous prime is 13309229. The next prime is 13309271. The reversal of 13309243 is 34290331.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34290331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13309243 - 2¹³ = 13301051 is a prime.

It is not a weakly prime, because it can be changed into another prime (13309213) 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 as a sum of consecutive naturals, namely, 6654621 + 6654622.

It is an arithmetic number, because the mean of its divisors is an integer number (6654622).

Almost surely, 2^13309243 is an apocalyptic number.

13309243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309243 is an equidigital number, since it uses as much as digits as its factorization.

13309243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 13309243 is about 3648.1835206031. The cubic root of 13309243 is about 236.9833229614.

Adding to 13309243 its reverse (34290331), we get a palindrome (47599574).

The spelling of 13309243 in words is "thirteen million, three hundred nine thousand, two hundred forty-three".