13040663 has 4 divisors (see below), whose sum is σ = 13063248. Its totient is φ = 13018080.

The previous prime is 13040659. The next prime is 13040689. The reversal of 13040663 is 36604031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36604031 = 2237 ⋅16363.

It is a cyclic number.

It is not a de Polignac number, because 13040663 - 2² = 13040659 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 (13040603) 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, 10403 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (3265812).

Almost surely, 2^13040663 is an apocalyptic number.

13040663 is a deficient number, since it is larger than the sum of its proper divisors (22585).

13040663 is an equidigital number, since it uses as much as digits as its factorization.

13040663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22584.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 13040663 is about 3611.1858163213. The cubic root of 13040663 is about 235.3783734027.

Adding to 13040663 its reverse (36604031), we get a palindrome (49644694).

The spelling of 13040663 in words is "thirteen million, forty thousand, six hundred sixty-three".