13218659 has 2 divisors, whose sum is σ = 13218660. Its totient is φ = 13218658.

The previous prime is 13218649. The next prime is 13218671. The reversal of 13218659 is 95681231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13218659 - 2²⁰ = 12170083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13218619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609329 + 6609330.

It is an arithmetic number, because the mean of its divisors is an integer number (6609330).

Almost surely, 2^13218659 is an apocalyptic number.

13218659 is a deficient number, since it is larger than the sum of its proper divisors (1).

13218659 is an equidigital number, since it uses as much as digits as its factorization.

13218659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 13218659 is about 3635.7473784629. The cubic root of 13218659 is about 236.4444547416. Note that the first 4 decimals are identical.

The spelling of 13218659 in words is "thirteen million, two hundred eighteen thousand, six hundred fifty-nine".