12397409 has 2 divisors, whose sum is σ = 12397410. Its totient is φ = 12397408.

The previous prime is 12397397. The next prime is 12397417. The reversal of 12397409 is 90479321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 2411809 = 3160^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 12397409 - 2¹² = 12393313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12397499) 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, 6198704 + 6198705.

It is an arithmetic number, because the mean of its divisors is an integer number (6198705).

Almost surely, 2^12397409 is an apocalyptic number.

It is an amenable number.

12397409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12397409 is an equidigital number, since it uses as much as digits as its factorization.

12397409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 12397409 is about 3520.9954558335. The cubic root of 12397409 is about 231.4427830924.

The spelling of 12397409 in words is "twelve million, three hundred ninety-seven thousand, four hundred nine".