12447389 has 2 divisors, whose sum is σ = 12447390. Its totient is φ = 12447388.

The previous prime is 12447377. The next prime is 12447401. The reversal of 12447389 is 98374421.

It is a balanced prime because it is at equal distance from previous prime (12447377) and next prime (12447401).

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 267289 = 3490^2 + 517^2 .

It is a cyclic number.

It is not a de Polignac number, because 12447389 - 2⁴ = 12447373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12447329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223694 + 6223695.

It is an arithmetic number, because the mean of its divisors is an integer number (6223695).

Almost surely, 2^12447389 is an apocalyptic number.

It is an amenable number.

12447389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447389 is an equidigital number, since it uses as much as digits as its factorization.

12447389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 12447389 is about 3528.0857415885. The cubic root of 12447389 is about 231.7533856348.

The spelling of 12447389 in words is "twelve million, four hundred forty-seven thousand, three hundred eighty-nine".