12427997 has 2 divisors, whose sum is σ = 12427998. Its totient is φ = 12427996.

The previous prime is 12427991. The next prime is 12428011. The reversal of 12427997 is 79972421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 219961 = 3494^2 + 469^2 .

It is an emirp because it is prime and its reverse (79972421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12427997 - 2⁸ = 12427741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12427991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213998 + 6213999.

It is an arithmetic number, because the mean of its divisors is an integer number (6213999).

Almost surely, 2^12427997 is an apocalyptic number.

It is an amenable number.

12427997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12427997 is an equidigital number, since it uses as much as digits as its factorization.

12427997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 12427997 is about 3525.3364378453. The cubic root of 12427997 is about 231.6329722287.

The spelling of 12427997 in words is "twelve million, four hundred twenty-seven thousand, nine hundred ninety-seven".