13144647 has 4 divisors (see below), whose sum is σ = 17526200. Its totient is φ = 8763096.

The previous prime is 13144639. The next prime is 13144673. The reversal of 13144647 is 74644131.

13144647 is digitally balanced in base 3, 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.

It is not a de Polignac number, because 13144647 - 2³ = 13144639 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 (13144697) 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, 2190772 + ... + 2190777.

It is an arithmetic number, because the mean of its divisors is an integer number (4381550).

Almost surely, 2^13144647 is an apocalyptic number.

13144647 is a deficient number, since it is larger than the sum of its proper divisors (4381553).

13144647 is an equidigital number, since it uses as much as digits as its factorization.

13144647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381552.

The product of its digits is 8064, while the sum is 30.

The square root of 13144647 is about 3625.5547161779. The cubic root of 13144647 is about 236.0023400611.

Adding to 13144647 its reverse (74644131), we get a palindrome (87788778).

The spelling of 13144647 in words is "thirteen million, one hundred forty-four thousand, six hundred forty-seven".