12669191 has 2 divisors, whose sum is σ = 12669192. Its totient is φ = 12669190.

The previous prime is 12669187. The next prime is 12669193. The reversal of 12669191 is 19196621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12669191 - 2² = 12669187 is a prime.

Together with 12669193, 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 (12669193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334595 + 6334596.

It is an arithmetic number, because the mean of its divisors is an integer number (6334596).

Almost surely, 2^12669191 is an apocalyptic number.

12669191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12669191 is an equidigital number, since it uses as much as digits as its factorization.

12669191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 35.

The square root of 12669191 is about 3559.3807045608. The cubic root of 12669191 is about 233.1218394251.

The spelling of 12669191 in words is "twelve million, six hundred sixty-nine thousand, one hundred ninety-one".