12985799 has 2 divisors, whose sum is σ = 12985800. Its totient is φ = 12985798.

The previous prime is 12985747. The next prime is 12985801. The reversal of 12985799 is 99758921.

It is a happy number.

12985799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (99758921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12985799 is a prime.

It is a Sophie Germain prime.

Together with 12985801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12945799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492899 + 6492900.

It is an arithmetic number, because the mean of its divisors is an integer number (6492900).

Almost surely, 2^12985799 is an apocalyptic number.

12985799 is a deficient number, since it is larger than the sum of its proper divisors (1).

12985799 is an equidigital number, since it uses as much as digits as its factorization.

12985799 is an evil number, because the sum of its binary digits is even.

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

The square root of 12985799 is about 3603.5814129835. The cubic root of 12985799 is about 235.0478188490.

The spelling of 12985799 in words is "twelve million, nine hundred eighty-five thousand, seven hundred ninety-nine".