12990647 has 2 divisors, whose sum is σ = 12990648. Its totient is φ = 12990646.

The previous prime is 12990641. The next prime is 12990667. The reversal of 12990647 is 74609921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12990647 - 2⁴ = 12990631 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 12990647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12990641) 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, 6495323 + 6495324.

It is an arithmetic number, because the mean of its divisors is an integer number (6495324).

Almost surely, 2^12990647 is an apocalyptic number.

12990647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12990647 is an equidigital number, since it uses as much as digits as its factorization.

12990647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12990647 is about 3604.2540143558. The cubic root of 12990647 is about 235.0770654142.

The spelling of 12990647 in words is "twelve million, nine hundred ninety thousand, six hundred forty-seven".