11391109 has 4 divisors (see below), whose sum is σ = 11404204. Its totient is φ = 11378016.

The previous prime is 11391101. The next prime is 11391119. The reversal of 11391109 is 90119311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 10824100 = 753^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 11391109 - 2³ = 11391101 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 (11391101) 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, 5142 + ... + 7015.

It is an arithmetic number, because the mean of its divisors is an integer number (2851051).

Almost surely, 2^11391109 is an apocalyptic number.

It is an amenable number.

11391109 is a deficient number, since it is larger than the sum of its proper divisors (13095).

11391109 is an equidigital number, since it uses as much as digits as its factorization.

11391109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11391109 is about 3375.0717029420. The cubic root of 11391109 is about 225.0031867861.

The spelling of 11391109 in words is "eleven million, three hundred ninety-one thousand, one hundred nine".