13218743 has 2 divisors, whose sum is σ = 13218744. Its totient is φ = 13218742.

The previous prime is 13218727. The next prime is 13218823. The reversal of 13218743 is 34781231.

It is a weak prime.

It is an emirp because it is prime and its reverse (34781231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13218743 - 2⁴ = 13218727 is a prime.

It is equal to p₈₆₂₅₄₄ and since 13218743 and 862544 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13218943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609371 + 6609372.

It is an arithmetic number, because the mean of its divisors is an integer number (6609372).

Almost surely, 2^13218743 is an apocalyptic number.

13218743 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218743 is an equidigital number, since it uses as much as digits as its factorization.

13218743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 13218743 is about 3635.7589304023. The cubic root of 13218743 is about 236.4449555814. Note that the first 3 decimals are identical.

Adding to 13218743 its reverse (34781231), we get a palindrome (47999974).

The spelling of 13218743 in words is "thirteen million, two hundred eighteen thousand, seven hundred forty-three".