12397289 has 2 divisors, whose sum is σ = 12397290. Its totient is φ = 12397288.

The previous prime is 12397277. The next prime is 12397309. The reversal of 12397289 is 98279321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 6889 = 3520^2 + 83^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12397289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12397249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198644 + 6198645.

It is an arithmetic number, because the mean of its divisors is an integer number (6198645).

Almost surely, 2^12397289 is an apocalyptic number.

It is an amenable number.

12397289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12397289 is an equidigital number, since it uses as much as digits as its factorization.

12397289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 12397289 is about 3520.9784151568. The cubic root of 12397289 is about 231.4420363443.

The spelling of 12397289 in words is "twelve million, three hundred ninety-seven thousand, two hundred eighty-nine".