12663191 has 2 divisors, whose sum is σ = 12663192. Its totient is φ = 12663190.

The previous prime is 12663143. The next prime is 12663193. The reversal of 12663191 is 19136621.

12663191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12663191 - 2⁶ = 12663127 is a prime.

It is a Sophie Germain prime.

Together with 12663193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12663193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331595 + 6331596.

It is an arithmetic number, because the mean of its divisors is an integer number (6331596).

Almost surely, 2^12663191 is an apocalyptic number.

12663191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12663191 is an equidigital number, since it uses as much as digits as its factorization.

12663191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 12663191 is about 3558.5377614970. The cubic root of 12663191 is about 233.0850322366.

The spelling of 12663191 in words is "twelve million, six hundred sixty-three thousand, one hundred ninety-one".