13638223 has 2 divisors, whose sum is σ = 13638224. Its totient is φ = 13638222.

The previous prime is 13638211. The next prime is 13638239. The reversal of 13638223 is 32283631.

It is a weak prime.

It is an emirp because it is prime and its reverse (32283631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13638223 - 2¹³ = 13630031 is a prime.

It is a super-2 number, since 2×13638223² = 372002253195458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13638191 and 13638200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13638203) 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 as a sum of consecutive naturals, namely, 6819111 + 6819112.

It is an arithmetic number, because the mean of its divisors is an integer number (6819112).

Almost surely, 2^13638223 is an apocalyptic number.

13638223 is a deficient number, since it is larger than the sum of its proper divisors (1).

13638223 is an equidigital number, since it uses as much as digits as its factorization.

13638223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 13638223 is about 3692.9964798250. The cubic root of 13638223 is about 238.9200493535.

It can be divided in two parts, 13638 and 223, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 13638223 in words is "thirteen million, six hundred thirty-eight thousand, two hundred twenty-three".