13909171 has 4 divisors (see below), whose sum is σ = 13917232. Its totient is φ = 13901112.

The previous prime is 13909169. The next prime is 13909177. The reversal of 13909171 is 17190931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17190931 = 41 ⋅419291.

It is a cyclic number.

It is not a de Polignac number, because 13909171 - 2¹ = 13909169 is a prime.

It is the 3730-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13909177) by changing a digit.

It is a nontrivial repunit in base 3729.

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, 276 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (3479308).

Almost surely, 2^13909171 is an apocalyptic number.

13909171 is a deficient number, since it is larger than the sum of its proper divisors (8061).

13909171 is an equidigital number, since it uses as much as digits as its factorization.

13909171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 13909171 is about 3729.5001005497. The cubic root of 13909171 is about 240.4918789391.

The spelling of 13909171 in words is "thirteen million, nine hundred nine thousand, one hundred seventy-one".