13684247 has 4 divisors (see below), whose sum is σ = 13697016. Its totient is φ = 13671480.

The previous prime is 13684219. The next prime is 13684267. The reversal of 13684247 is 74248631.

13684247 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 an emirpimes, since its reverse is a distinct semiprime: 74248631 = 347 ⋅213973.

It is a cyclic number.

It is not a de Polignac number, because 13684247 - 2⁶ = 13684183 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 (13684217) 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, 4613 + ... + 6974.

It is an arithmetic number, because the mean of its divisors is an integer number (3424254).

Almost surely, 2^13684247 is an apocalyptic number.

13684247 is a deficient number, since it is larger than the sum of its proper divisors (12769).

13684247 is a wasteful number, since it uses less digits than its factorization.

13684247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12768.

The product of its digits is 32256, while the sum is 35.

The square root of 13684247 is about 3699.2224858746. Note that the first 3 decimals coincide. The cubic root of 13684247 is about 239.1885034444.

It can be divided in two parts, 13684 and 247, that added together give a palindrome (13931).

The spelling of 13684247 in words is "thirteen million, six hundred eighty-four thousand, two hundred forty-seven".