13663003 has 4 divisors (see below), whose sum is σ = 13671288. Its totient is φ = 13654720.

The previous prime is 13662983. The next prime is 13663009. The reversal of 13663003 is 30036631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30036631 = 1777 ⋅16903.

It is a cyclic number.

It is not a de Polignac number, because 13663003 - 2¹³ = 13654811 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13663009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733 + ... + 5278.

It is an arithmetic number, because the mean of its divisors is an integer number (3417822).

Almost surely, 2^13663003 is an apocalyptic number.

13663003 is a deficient number, since it is larger than the sum of its proper divisors (8285).

13663003 is an equidigital number, since it uses as much as digits as its factorization.

13663003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 13663003 is about 3696.3499563759. The cubic root of 13663003 is about 239.0646639102.

Adding to 13663003 its reverse (30036631), we get a palindrome (43699634).

The spelling of 13663003 in words is "thirteen million, six hundred sixty-three thousand, three".