13663587 has 16 divisors (see below), whose sum is σ = 21726720. Its totient is φ = 7468032.

The previous prime is 13663577. The next prime is 13663609. The reversal of 13663587 is 78536631.

It is not a de Polignac number, because 13663587 - 2¹⁴ = 13647203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13663577) 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 15 ways as a sum of consecutive naturals, for example, 13662 + ... + 14627.

It is an arithmetic number, because the mean of its divisors is an integer number (1357920).

Almost surely, 2^13663587 is an apocalyptic number.

13663587 is a deficient number, since it is larger than the sum of its proper divisors (8063133).

13663587 is a wasteful number, since it uses less digits than its factorization.

13663587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28322.

The product of its digits is 90720, while the sum is 39.

The square root of 13663587 is about 3696.4289523809. The cubic root of 13663587 is about 239.0680699886.

The spelling of 13663587 in words is "thirteen million, six hundred sixty-three thousand, five hundred eighty-seven".