13638559 has 8 divisors (see below), whose sum is σ = 14905728. Its totient is φ = 12375960.

The previous prime is 13638551. The next prime is 13638593. The reversal of 13638559 is 95583631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13638559 - 2³ = 13638551 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 (13638551) 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 7 ways as a sum of consecutive naturals, for example, 9294 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (1863216).

Almost surely, 2^13638559 is an apocalyptic number.

13638559 is a deficient number, since it is larger than the sum of its proper divisors (1267169).

13638559 is a wasteful number, since it uses less digits than its factorization.

13638559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285.

The product of its digits is 97200, while the sum is 40.

The square root of 13638559 is about 3693.0419710585. The cubic root of 13638559 is about 238.9220113999.

The spelling of 13638559 in words is "thirteen million, six hundred thirty-eight thousand, five hundred fifty-nine".