12992009 has 2 divisors, whose sum is σ = 12992010. Its totient is φ = 12992008.

The previous prime is 12992003. The next prime is 12992017. The reversal of 12992009 is 90029921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7038409 + 5953600 = 2653^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 12992009 - 2⁸ = 12991753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12992003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6496004 + 6496005.

It is an arithmetic number, because the mean of its divisors is an integer number (6496005).

Almost surely, 2^12992009 is an apocalyptic number.

It is an amenable number.

12992009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12992009 is an equidigital number, since it uses as much as digits as its factorization.

12992009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 12992009 is about 3604.4429528014. The cubic root of 12992009 is about 235.0852806523.

The spelling of 12992009 in words is "twelve million, nine hundred ninety-two thousand, nine".