13204909 has 4 divisors (see below), whose sum is σ = 13333216. Its totient is φ = 13076604.

The previous prime is 13204907. The next prime is 13204949. The reversal of 13204909 is 90940231.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 90940231 = 1381 ⋅65851.

It is a cyclic number.

It is not a de Polignac number, because 13204909 - 2¹ = 13204907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204907) 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, 63999 + ... + 64204.

It is an arithmetic number, because the mean of its divisors is an integer number (3333304).

Almost surely, 2^13204909 is an apocalyptic number.

It is an amenable number.

13204909 is a deficient number, since it is larger than the sum of its proper divisors (128307).

13204909 is a wasteful number, since it uses less digits than its factorization.

13204909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128306.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13204909 is about 3633.8559410081. The cubic root of 13204909 is about 236.3624434179.

The spelling of 13204909 in words is "thirteen million, two hundred four thousand, nine hundred nine".