12818431 has 2 divisors, whose sum is σ = 12818432. Its totient is φ = 12818430.

The previous prime is 12818417. The next prime is 12818447. The reversal of 12818431 is 13481821.

It is a weak prime.

It is an emirp because it is prime and its reverse (13481821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12818431 - 2¹⁷ = 12687359 is a prime.

It is a super-2 number, since 2×12818431² = 328624346603522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12818431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12818401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6409215 + 6409216.

It is an arithmetic number, because the mean of its divisors is an integer number (6409216).

Almost surely, 2^12818431 is an apocalyptic number.

12818431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12818431 is an equidigital number, since it uses as much as digits as its factorization.

12818431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 28.

The square root of 12818431 is about 3580.2836479810. The cubic root of 12818431 is about 234.0336413999.

The spelling of 12818431 in words is "twelve million, eight hundred eighteen thousand, four hundred thirty-one".