12931427 has 2 divisors, whose sum is σ = 12931428. Its totient is φ = 12931426.

The previous prime is 12931423. The next prime is 12931453. The reversal of 12931427 is 72413921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12931427 - 2² = 12931423 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12931427.

It is not a weakly prime, because it can be changed into another prime (12931423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6465713 + 6465714.

It is an arithmetic number, because the mean of its divisors is an integer number (6465714).

Almost surely, 2^12931427 is an apocalyptic number.

12931427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12931427 is an equidigital number, since it uses as much as digits as its factorization.

12931427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 12931427 is about 3596.0293380338. The cubic root of 12931427 is about 234.7193087483.

The spelling of 12931427 in words is "twelve million, nine hundred thirty-one thousand, four hundred twenty-seven".