13776109 has 4 divisors (see below), whose sum is σ = 13788160. Its totient is φ = 13764060.

The previous prime is 13776067. The next prime is 13776167. The reversal of 13776109 is 90167731.

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.

It is a cyclic number.

It is not a de Polignac number, because 13776109 - 2¹³ = 13767917 is a prime.

It is a super-3 number, since 3×13776109³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13776209) 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, 4107 + ... + 6664.

It is an arithmetic number, because the mean of its divisors is an integer number (3447040).

Almost surely, 2^13776109 is an apocalyptic number.

It is an amenable number.

13776109 is a deficient number, since it is larger than the sum of its proper divisors (12051).

13776109 is a wasteful number, since it uses less digits than its factorization.

13776109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12050.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 13776109 is about 3711.6181107436. The cubic root of 13776109 is about 239.7225323483.

The spelling of 13776109 in words is "thirteen million, seven hundred seventy-six thousand, one hundred nine".