12429947 has 2 divisors, whose sum is σ = 12429948. Its totient is φ = 12429946.

The previous prime is 12429889. The next prime is 12429953. The reversal of 12429947 is 74992421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12429947 - 2⁶ = 12429883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12429947.

It is not a weakly prime, because it can be changed into another prime (12429247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214973 + 6214974.

It is an arithmetic number, because the mean of its divisors is an integer number (6214974).

Almost surely, 2^12429947 is an apocalyptic number.

12429947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12429947 is an equidigital number, since it uses as much as digits as its factorization.

12429947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 12429947 is about 3525.6129963455. The cubic root of 12429947 is about 231.6450862933.

The spelling of 12429947 in words is "twelve million, four hundred twenty-nine thousand, nine hundred forty-seven".