13073209 has 4 divisors (see below), whose sum is σ = 13083280. Its totient is φ = 13063140.

The previous prime is 13073201. The next prime is 13073213. The reversal of 13073209 is 90237031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90237031 = 4421 ⋅20411.

It is a cyclic number.

It is not a de Polignac number, because 13073209 - 2³ = 13073201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13073201) 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, 2739 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (3270820).

Almost surely, 2^13073209 is an apocalyptic number.

It is an amenable number.

13073209 is a deficient number, since it is larger than the sum of its proper divisors (10071).

13073209 is an equidigital number, since it uses as much as digits as its factorization.

13073209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10070.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 13073209 is about 3615.6892842168. The cubic root of 13073209 is about 235.5740245085.

The spelling of 13073209 in words is "thirteen million, seventy-three thousand, two hundred nine".