13163209 has 4 divisors (see below), whose sum is σ = 13170816. Its totient is φ = 13155604.

The previous prime is 13163201. The next prime is 13163221. The reversal of 13163209 is 90236131.

13163209 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, 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: 90236131 = 337 ⋅267763.

It is a cyclic number.

It is not a de Polignac number, because 13163209 - 2³ = 13163201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13163201) 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, 192 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (3292704).

Almost surely, 2^13163209 is an apocalyptic number.

It is an amenable number.

13163209 is a deficient number, since it is larger than the sum of its proper divisors (7607).

13163209 is an equidigital number, since it uses as much as digits as its factorization.

13163209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13163209 is about 3628.1136972261. The cubic root of 13163209 is about 236.1133767697.

The spelling of 13163209 in words is "thirteen million, one hundred sixty-three thousand, two hundred nine".