13001309 has 4 divisors (see below), whose sum is σ = 13449660. Its totient is φ = 12552960.

The previous prime is 13001291. The next prime is 13001321. The reversal of 13001309 is 90310031.

13001309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7812025 + 5189284 = 2795^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 13001309 - 2¹² = 12997213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001389) 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, 224132 + ... + 224189.

It is an arithmetic number, because the mean of its divisors is an integer number (3362415).

Almost surely, 2^13001309 is an apocalyptic number.

It is an amenable number.

13001309 is a deficient number, since it is larger than the sum of its proper divisors (448351).

13001309 is an equidigital number, since it uses as much as digits as its factorization.

13001309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448350.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 13001309 is about 3605.7327965339. The cubic root of 13001309 is about 235.1413605511.

The spelling of 13001309 in words is "thirteen million, one thousand, three hundred nine".