13644647 has 2 divisors, whose sum is σ = 13644648. Its totient is φ = 13644646.

The previous prime is 13644629. The next prime is 13644667. The reversal of 13644647 is 74644631.

13644647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13644647 - 2⁸ = 13644391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13644607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822323 + 6822324.

It is an arithmetic number, because the mean of its divisors is an integer number (6822324).

Almost surely, 2^13644647 is an apocalyptic number.

13644647 is a deficient number, since it is larger than the sum of its proper divisors (1).

13644647 is an equidigital number, since it uses as much as digits as its factorization.

13644647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 13644647 is about 3693.8661318461. The cubic root of 13644647 is about 238.9575562310.

The spelling of 13644647 in words is "thirteen million, six hundred forty-four thousand, six hundred forty-seven".