13309643 has 2 divisors, whose sum is σ = 13309644. Its totient is φ = 13309642.

The previous prime is 13309627. The next prime is 13309649. The reversal of 13309643 is 34690331.

13309643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13309643 - 2⁴ = 13309627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13309649) 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, 6654821 + 6654822.

It is an arithmetic number, because the mean of its divisors is an integer number (6654822).

Almost surely, 2^13309643 is an apocalyptic number.

13309643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309643 is an equidigital number, since it uses as much as digits as its factorization.

13309643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 13309643 is about 3648.2383419947. The cubic root of 13309643 is about 236.9856970604.

Adding to 13309643 its reverse (34690331), we get a palindrome (47999974).

The spelling of 13309643 in words is "thirteen million, three hundred nine thousand, six hundred forty-three".