12817897 has 2 divisors, whose sum is σ = 12817898. Its totient is φ = 12817896.

The previous prime is 12817867. The next prime is 12817907. The reversal of 12817897 is 79871821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 4227136 = 2931^2 + 2056^2 .

It is a cyclic number.

It is not a de Polignac number, because 12817897 - 2⁷ = 12817769 is a prime.

It is not a weakly prime, because it can be changed into another prime (12817807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6408948 + 6408949.

It is an arithmetic number, because the mean of its divisors is an integer number (6408949).

Almost surely, 2^12817897 is an apocalyptic number.

It is an amenable number.

12817897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12817897 is an equidigital number, since it uses as much as digits as its factorization.

12817897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 43.

The square root of 12817897 is about 3580.2090721074. The cubic root of 12817897 is about 234.0303915040.

The spelling of 12817897 in words is "twelve million, eight hundred seventeen thousand, eight hundred ninety-seven".