13309305 has 16 divisors (see below), whose sum is σ = 21596544. Its totient is φ = 6997760.

The previous prime is 13309301. The next prime is 13309337. The reversal of 13309305 is 50390331.

13309305 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13309305 - 2² = 13309301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13309301) 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 15 ways as a sum of consecutive naturals, for example, 5184 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1349784).

Almost surely, 2^13309305 is an apocalyptic number.

13309305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13309305 is a deficient number, since it is larger than the sum of its proper divisors (8287239).

13309305 is a wasteful number, since it uses less digits than its factorization.

13309305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12576.

The product of its (nonzero) digits is 1215, while the sum is 24.

The square root of 13309305 is about 3648.1920179727. The cubic root of 13309305 is about 236.9836909499.

Adding to 13309305 its reverse (50390331), we get a palindrome (63699636).

The spelling of 13309305 in words is "thirteen million, three hundred nine thousand, three hundred five".