13218823 has 2 divisors, whose sum is σ = 13218824. Its totient is φ = 13218822.

The previous prime is 13218743. The next prime is 13218827. The reversal of 13218823 is 32881231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13218823 - 2⁹ = 13218311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13218791 and 13218800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13218827) 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, 6609411 + 6609412.

It is an arithmetic number, because the mean of its divisors is an integer number (6609412).

Almost surely, 2^13218823 is an apocalyptic number.

13218823 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218823 is an equidigital number, since it uses as much as digits as its factorization.

13218823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 13218823 is about 3635.7699322152. The cubic root of 13218823 is about 236.4454325698.

It can be divided in two parts, 13218 and 823, that added together give a palindrome (14041).

The spelling of 13218823 in words is "thirteen million, two hundred eighteen thousand, eight hundred twenty-three".