13638111 has 4 divisors (see below), whose sum is σ = 18184152. Its totient is φ = 9092072.

The previous prime is 13638101. The next prime is 13638137. The reversal of 13638111 is 11183631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11183631 = 3 ⋅3727877.

It is a cyclic number.

It is not a de Polignac number, because 13638111 - 2⁷ = 13637983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638101) 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, 2273016 + ... + 2273021.

It is an arithmetic number, because the mean of its divisors is an integer number (4546038).

Almost surely, 2^13638111 is an apocalyptic number.

13638111 is a deficient number, since it is larger than the sum of its proper divisors (4546041).

13638111 is an equidigital number, since it uses as much as digits as its factorization.

13638111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546040.

The product of its digits is 432, while the sum is 24.

The square root of 13638111 is about 3692.9813159560. The cubic root of 13638111 is about 238.9193953309.

The spelling of 13638111 in words is "thirteen million, six hundred thirty-eight thousand, one hundred eleven".