12919427 has 2 divisors, whose sum is σ = 12919428. Its totient is φ = 12919426.

The previous prime is 12919397. The next prime is 12919429. The reversal of 12919427 is 72491921.

It is a strong prime.

It is an emirp because it is prime and its reverse (72491921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12919427 - 2¹⁸ = 12657283 is a prime.

Together with 12919429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12919429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459713 + 6459714.

It is an arithmetic number, because the mean of its divisors is an integer number (6459714).

Almost surely, 2^12919427 is an apocalyptic number.

12919427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919427 is an equidigital number, since it uses as much as digits as its factorization.

12919427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 12919427 is about 3594.3604438064. The cubic root of 12919427 is about 234.6466819762.

The spelling of 12919427 in words is "twelve million, nine hundred nineteen thousand, four hundred twenty-seven".