13638087 has 12 divisors (see below), whose sum is σ = 19757920. Its totient is φ = 9065088.

The previous prime is 13638077. The next prime is 13638101. The reversal of 13638087 is 78083631.

13638087 is a `hidden beast` number, since 13 + 638 + 0 + 8 + 7 = 666.

It is not a de Polignac number, because 13638087 - 2²³ = 5249479 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638077) 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 11 ways as a sum of consecutive naturals, for example, 1239 + ... + 5367.

Almost surely, 2^13638087 is an apocalyptic number.

13638087 is a deficient number, since it is larger than the sum of its proper divisors (6119833).

13638087 is a wasteful number, since it uses less digits than its factorization.

13638087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502 (or 4499 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13638087 is about 3692.9780665474. The cubic root of 13638087 is about 238.9192551828.

The spelling of 13638087 in words is "thirteen million, six hundred thirty-eight thousand, eighty-seven".