12397817 has 2 divisors, whose sum is σ = 12397818. Its totient is φ = 12397816.

The previous prime is 12397787. The next prime is 12397829. The reversal of 12397817 is 71879321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11723776 + 674041 = 3424^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 12397817 - 2⁶ = 12397753 is a prime.

It is not a weakly prime, because it can be changed into another prime (12397837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198908 + 6198909.

It is an arithmetic number, because the mean of its divisors is an integer number (6198909).

Almost surely, 2^12397817 is an apocalyptic number.

It is an amenable number.

12397817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12397817 is an equidigital number, since it uses as much as digits as its factorization.

12397817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 12397817 is about 3521.0533935173. The cubic root of 12397817 is about 231.4453219998.

The spelling of 12397817 in words is "twelve million, three hundred ninety-seven thousand, eight hundred seventeen".