13770109 has 4 divisors (see below), whose sum is σ = 13779616. Its totient is φ = 13760604.

The previous prime is 13770091. The next prime is 13770131. The reversal of 13770109 is 90107731.

It is a happy number.

13770109 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13770109 - 2⁷ = 13769981 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 (13770149) 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, 2079 + ... + 5644.

It is an arithmetic number, because the mean of its divisors is an integer number (3444904).

Almost surely, 2^13770109 is an apocalyptic number.

It is an amenable number.

13770109 is a deficient number, since it is larger than the sum of its proper divisors (9507).

13770109 is an equidigital number, since it uses as much as digits as its factorization.

13770109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9506.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 13770109 is about 3710.8097499063. The cubic root of 13770109 is about 239.6877246470.

The spelling of 13770109 in words is "thirteen million, seven hundred seventy thousand, one hundred nine".