13638513 has 12 divisors (see below), whose sum is σ = 21153840. Its totient is φ = 7793352.

The previous prime is 13638511. The next prime is 13638551. The reversal of 13638513 is 31583631.

It is not a de Polignac number, because 13638513 - 2¹ = 13638511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13638511) 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, 46243 + ... + 46536.

It is an arithmetic number, because the mean of its divisors is an integer number (1762820).

Almost surely, 2^13638513 is an apocalyptic number.

It is an amenable number.

13638513 is a deficient number, since it is larger than the sum of its proper divisors (7515327).

13638513 is an equidigital number, since it uses as much as digits as its factorization.

13638513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92796 (or 92789 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 13638513 is about 3693.0357431252. The cubic root of 13638513 is about 238.9217427883.

The spelling of 13638513 in words is "thirteen million, six hundred thirty-eight thousand, five hundred thirteen".