13073309 has 4 divisors (see below), whose sum is σ = 13189116. Its totient is φ = 12957504.

The previous prime is 13073293. The next prime is 13073317. The reversal of 13073309 is 90337031.

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 77284 + 12996025 = 278^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 13073309 - 2⁴ = 13073293 is a prime.

It is a super-2 number, since 2×13073309² = 341822816418962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13073329) 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, 57734 + ... + 57959.

It is an arithmetic number, because the mean of its divisors is an integer number (3297279).

Almost surely, 2^13073309 is an apocalyptic number.

It is an amenable number.

13073309 is a deficient number, since it is larger than the sum of its proper divisors (115807).

13073309 is a wasteful number, since it uses less digits than its factorization.

13073309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115806.

The product of its (nonzero) digits is 1701, while the sum is 26.

The square root of 13073309 is about 3615.7031128122. The cubic root of 13073309 is about 235.5746251603.

The spelling of 13073309 in words is "thirteen million, seventy-three thousand, three hundred nine".