13387663 has 4 divisors (see below), whose sum is σ = 13699048. Its totient is φ = 13076280.

The previous prime is 13387643. The next prime is 13387667. The reversal of 13387663 is 36678331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36678331 = 113 ⋅324587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13387663 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 (13387667) 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, 155628 + ... + 155713.

It is an arithmetic number, because the mean of its divisors is an integer number (3424762).

Almost surely, 2^13387663 is an apocalyptic number.

13387663 is a deficient number, since it is larger than the sum of its proper divisors (311385).

13387663 is an equidigital number, since it uses as much as digits as its factorization.

13387663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311384.

The product of its digits is 54432, while the sum is 37.

The square root of 13387663 is about 3658.9155497223. The cubic root of 13387663 is about 237.4478585443.

The spelling of 13387663 in words is "thirteen million, three hundred eighty-seven thousand, six hundred sixty-three".