13638211 has 2 divisors, whose sum is σ = 13638212. Its totient is φ = 13638210.

The previous prime is 13638203. The next prime is 13638223. The reversal of 13638211 is 11283631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13638211 - 2³ = 13638203 is a prime.

It is not a weakly prime, because it can be changed into another prime (13638511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819105 + 6819106.

It is an arithmetic number, because the mean of its divisors is an integer number (6819106).

Almost surely, 2^13638211 is an apocalyptic number.

13638211 is a deficient number, since it is larger than the sum of its proper divisors (1).

13638211 is an equidigital number, since it uses as much as digits as its factorization.

13638211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 13638211 is about 3692.9948551277. The cubic root of 13638211 is about 238.9199792799.

The spelling of 13638211 in words is "thirteen million, six hundred thirty-eight thousand, two hundred eleven".