12813791 has 2 divisors, whose sum is σ = 12813792. Its totient is φ = 12813790.

The previous prime is 12813761. The next prime is 12813833. The reversal of 12813791 is 19731821.

It is a weak prime.

It is an emirp because it is prime and its reverse (19731821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12813791 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 (12813701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406895 + 6406896.

It is an arithmetic number, because the mean of its divisors is an integer number (6406896).

Almost surely, 2^12813791 is an apocalyptic number.

12813791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12813791 is an equidigital number, since it uses as much as digits as its factorization.

12813791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 12813791 is about 3579.6355959790. The cubic root of 12813791 is about 234.0053995881.

The spelling of 12813791 in words is "twelve million, eight hundred thirteen thousand, seven hundred ninety-one".