11219909 has 4 divisors (see below), whose sum is σ = 11234304. Its totient is φ = 11205516.

The previous prime is 11219903. The next prime is 11219933. The reversal of 11219909 is 90991211.

11219909 is nontrivially palindromic in base 14.

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: 90991211 = 3643 ⋅24977.

It is a cyclic number.

It is not a de Polignac number, because 11219909 - 2¹⁶ = 11154373 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 (11219903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5957 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (2808576).

Almost surely, 2^11219909 is an apocalyptic number.

It is an amenable number.

11219909 is a deficient number, since it is larger than the sum of its proper divisors (14395).

11219909 is an equidigital number, since it uses as much as digits as its factorization.

11219909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14394.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 11219909 is about 3349.6132612587. The cubic root of 11219909 is about 223.8702812398.

The spelling of 11219909 in words is "eleven million, two hundred nineteen thousand, nine hundred nine".