13309313 has 4 divisors (see below), whose sum is σ = 13359060. Its totient is φ = 13259568.

The previous prime is 13309301. The next prime is 13309337. The reversal of 13309313 is 31390331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1803649 + 11505664 = 1343^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 13309313 - 2¹⁰ = 13308289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13309363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24470 + ... + 25007.

It is an arithmetic number, because the mean of its divisors is an integer number (3339765).

Almost surely, 2^13309313 is an apocalyptic number.

It is an amenable number.

13309313 is a deficient number, since it is larger than the sum of its proper divisors (49747).

13309313 is an equidigital number, since it uses as much as digits as its factorization.

13309313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49746.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 13309313 is about 3648.1931144061. The cubic root of 13309313 is about 236.9837384322.

Adding to 13309313 its reverse (31390331), we get a palindrome (44699644).

The spelling of 13309313 in words is "thirteen million, three hundred nine thousand, three hundred thirteen".