13243663 has 4 divisors (see below), whose sum is σ = 14022720. Its totient is φ = 12464608.

The previous prime is 13243661. The next prime is 13243717. The reversal of 13243663 is 36634231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36634231 = 547 ⋅66973.

It is a cyclic number.

It is not a de Polignac number, because 13243663 - 2¹ = 13243661 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 (13243661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389503 + ... + 389536.

It is an arithmetic number, because the mean of its divisors is an integer number (3505680).

Almost surely, 2^13243663 is an apocalyptic number.

13243663 is a deficient number, since it is larger than the sum of its proper divisors (779057).

13243663 is an equidigital number, since it uses as much as digits as its factorization.

13243663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779056.

The product of its digits is 7776, while the sum is 28.

The square root of 13243663 is about 3639.1843866449. The cubic root of 13243663 is about 236.5934444733.

Adding to 13243663 its reverse (36634231), we get a palindrome (49877894).

The spelling of 13243663 in words is "thirteen million, two hundred forty-three thousand, six hundred sixty-three".