13720109 has 8 divisors (see below), whose sum is σ = 15553440. Its totient is φ = 11997936.

The previous prime is 13720061. The next prime is 13720127. The reversal of 13720109 is 90102731.

13720109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13720109 - 2¹⁶ = 13654573 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 (13720129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27527 + ... + 28020.

It is an arithmetic number, because the mean of its divisors is an integer number (1944180).

Almost surely, 2^13720109 is an apocalyptic number.

13720109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13720109 is a deficient number, since it is larger than the sum of its proper divisors (1833331).

13720109 is a wasteful number, since it uses less digits than its factorization.

13720109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55579.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 13720109 is about 3704.0665490782. The cubic root of 13720109 is about 239.3972665037.

The spelling of 13720109 in words is "thirteen million, seven hundred twenty thousand, one hundred nine".