12818591 has 2 divisors, whose sum is σ = 12818592. Its totient is φ = 12818590.

The previous prime is 12818569. The next prime is 12818599. The reversal of 12818591 is 19581821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12818591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12818599) 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, 6409295 + 6409296.

It is an arithmetic number, because the mean of its divisors is an integer number (6409296).

Almost surely, 2^12818591 is an apocalyptic number.

12818591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12818591 is an equidigital number, since it uses as much as digits as its factorization.

12818591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 35.

The square root of 12818591 is about 3580.3059925096. The cubic root of 12818591 is about 234.0346151339.

The spelling of 12818591 in words is "twelve million, eight hundred eighteen thousand, five hundred ninety-one".