12987599 has 2 divisors, whose sum is σ = 12987600. Its totient is φ = 12987598.

The previous prime is 12987593. The next prime is 12987647. The reversal of 12987599 is 99578921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12987599 - 2⁸ = 12987343 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12987593) 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, 6493799 + 6493800.

It is an arithmetic number, because the mean of its divisors is an integer number (6493800).

Almost surely, 2^12987599 is an apocalyptic number.

12987599 is a deficient number, since it is larger than the sum of its proper divisors (1).

12987599 is an equidigital number, since it uses as much as digits as its factorization.

12987599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The square root of 12987599 is about 3603.8311558673. The cubic root of 12987599 is about 235.0586785717.

The spelling of 12987599 in words is "twelve million, nine hundred eighty-seven thousand, five hundred ninety-nine".