13984909 has 4 divisors (see below), whose sum is σ = 14013216. Its totient is φ = 13956604.

The previous prime is 13984903. The next prime is 13984913. The reversal of 13984909 is 90948931.

13984909 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 90948931 = 1861 ⋅48871.

It is a cyclic number.

It is not a de Polignac number, because 13984909 - 2⁵ = 13984877 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 (13984903) 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, 13399 + ... + 14404.

It is an arithmetic number, because the mean of its divisors is an integer number (3503304).

Almost surely, 2^13984909 is an apocalyptic number.

It is an amenable number.

13984909 is a deficient number, since it is larger than the sum of its proper divisors (28307).

13984909 is an equidigital number, since it uses as much as digits as its factorization.

13984909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28306.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13984909 is about 3739.6402233370. The cubic root of 13984909 is about 240.9275965762.

The spelling of 13984909 in words is "thirteen million, nine hundred eighty-four thousand, nine hundred nine".