13191909 has 16 divisors (see below), whose sum is σ = 18624000. Its totient is φ = 8282736.

The previous prime is 13191907. The next prime is 13191911. The reversal of 13191909 is 90919131.

13191909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13191907) and next prime (13191911).

It is not a de Polignac number, because 13191909 - 2¹ = 13191907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13191909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13191901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10762 + ... + 11924.

It is an arithmetic number, because the mean of its divisors is an integer number (1164000).

Almost surely, 2^13191909 is an apocalyptic number.

13191909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13191909 is a deficient number, since it is larger than the sum of its proper divisors (5432091).

13191909 is a wasteful number, since it uses less digits than its factorization.

13191909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 13191909 is about 3632.0667670075. The cubic root of 13191909 is about 236.2848530647.

The spelling of 13191909 in words is "thirteen million, one hundred ninety-one thousand, nine hundred nine".