13728647 has 2 divisors, whose sum is σ = 13728648. Its totient is φ = 13728646.

The previous prime is 13728607. The next prime is 13728661. The reversal of 13728647 is 74682731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13728647 - 2⁸ = 13728391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13728647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13728607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6864323 + 6864324.

It is an arithmetic number, because the mean of its divisors is an integer number (6864324).

Almost surely, 2^13728647 is an apocalyptic number.

13728647 is a deficient number, since it is larger than the sum of its proper divisors (1).

13728647 is an equidigital number, since it uses as much as digits as its factorization.

13728647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 13728647 is about 3705.2188869215. The cubic root of 13728647 is about 239.4469150408.

The spelling of 13728647 in words is "thirteen million, seven hundred twenty-eight thousand, six hundred forty-seven".