13243647 has 8 divisors (see below), whose sum is σ = 17723056. Its totient is φ = 8796672.

The previous prime is 13243631. The next prime is 13243661. The reversal of 13243647 is 74634231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13243647 - 2⁴ = 13243631 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 (13243547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7138 + ... + 8799.

It is an arithmetic number, because the mean of its divisors is an integer number (2215382).

Almost surely, 2^13243647 is an apocalyptic number.

13243647 is a deficient number, since it is larger than the sum of its proper divisors (4479409).

13243647 is a wasteful number, since it uses less digits than its factorization.

13243647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217.

The product of its digits is 12096, while the sum is 30.

The square root of 13243647 is about 3639.1821883495. The cubic root of 13243647 is about 236.5933491951.

Adding to 13243647 its reverse (74634231), we get a palindrome (87877878).

The spelling of 13243647 in words is "thirteen million, two hundred forty-three thousand, six hundred forty-seven".