13218893 has 2 divisors, whose sum is σ = 13218894. Its totient is φ = 13218892.

The previous prime is 13218871. The next prime is 13218901. The reversal of 13218893 is 39881231.

13218893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 1261129 = 3458^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 13218893 - 2¹⁴ = 13202509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13218823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609446 + 6609447.

It is an arithmetic number, because the mean of its divisors is an integer number (6609447).

Almost surely, 2^13218893 is an apocalyptic number.

It is an amenable number.

13218893 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218893 is an equidigital number, since it uses as much as digits as its factorization.

13218893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 13218893 is about 3635.7795587742. The cubic root of 13218893 is about 236.4458499330.

The spelling of 13218893 in words is "thirteen million, two hundred eighteen thousand, eight hundred ninety-three".