12438947 has 2 divisors, whose sum is σ = 12438948. Its totient is φ = 12438946.

The previous prime is 12438931. The next prime is 12438983. The reversal of 12438947 is 74983421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12438947 - 2⁴ = 12438931 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12438947.

It is not a weakly prime, because it can be changed into another prime (12438247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219473 + 6219474.

It is an arithmetic number, because the mean of its divisors is an integer number (6219474).

Almost surely, 2^12438947 is an apocalyptic number.

12438947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12438947 is an equidigital number, since it uses as much as digits as its factorization.

12438947 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 12438947 is about 3526.8891391707. The cubic root of 12438947 is about 231.7009809485.

The spelling of 12438947 in words is "twelve million, four hundred thirty-eight thousand, nine hundred forty-seven".