12810191 has 2 divisors, whose sum is σ = 12810192. Its totient is φ = 12810190.

The previous prime is 12810169. The next prime is 12810209. The reversal of 12810191 is 19101821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12810191 - 2¹⁸ = 12548047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12810121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405095 + 6405096.

It is an arithmetic number, because the mean of its divisors is an integer number (6405096).

Almost surely, 2^12810191 is an apocalyptic number.

12810191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12810191 is an equidigital number, since it uses as much as digits as its factorization.

12810191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 12810191 is about 3579.1327161758. The cubic root of 12810191 is about 233.9834831403.

The spelling of 12810191 in words is "twelve million, eight hundred ten thousand, one hundred ninety-one".