13211409 has 4 divisors (see below), whose sum is σ = 17615216. Its totient is φ = 8807604.

The previous prime is 13211399. The next prime is 13211423. The reversal of 13211409 is 90411231.

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.

It is not a de Polignac number, because 13211409 - 2¹³ = 13203217 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13218409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2201899 + ... + 2201904.

It is an arithmetic number, because the mean of its divisors is an integer number (4403804).

Almost surely, 2^13211409 is an apocalyptic number.

It is an amenable number.

13211409 is a deficient number, since it is larger than the sum of its proper divisors (4403807).

13211409 is an equidigital number, since it uses as much as digits as its factorization.

13211409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403806.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13211409 is about 3634.7501977440. The cubic root of 13211409 is about 236.4012194989.

The spelling of 13211409 in words is "thirteen million, two hundred eleven thousand, four hundred nine".