11992109 has 4 divisors (see below), whose sum is σ = 12405660. Its totient is φ = 11578560.

The previous prime is 11992069. The next prime is 11992111. The reversal of 11992109 is 90129911.

11992109 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8940100 + 3052009 = 2990^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 11992109 - 2¹⁶ = 11926573 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 (11992139) 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, 206732 + ... + 206789.

It is an arithmetic number, because the mean of its divisors is an integer number (3101415).

Almost surely, 2^11992109 is an apocalyptic number.

It is an amenable number.

11992109 is a deficient number, since it is larger than the sum of its proper divisors (413551).

11992109 is an equidigital number, since it uses as much as digits as its factorization.

11992109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413550.

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

The square root of 11992109 is about 3462.9624600911. The cubic root of 11992109 is about 228.8926545063.

The spelling of 11992109 in words is "eleven million, nine hundred ninety-two thousand, one hundred nine".