12899899 has 2 divisors, whose sum is σ = 12899900. Its totient is φ = 12899898.

The previous prime is 12899897. The next prime is 12899951. The reversal of 12899899 is 99899821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12899899 - 2¹ = 12899897 is a prime.

It is a super-3 number, since 3×12899899³ (a number of 22 digits) contains 333 as substring.

Together with 12899897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12899893) 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, 6449949 + 6449950.

It is an arithmetic number, because the mean of its divisors is an integer number (6449950).

Almost surely, 2^12899899 is an apocalyptic number.

12899899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12899899 is an equidigital number, since it uses as much as digits as its factorization.

12899899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 55.

The square root of 12899899 is about 3591.6429388234. The cubic root of 12899899 is about 234.5283978078.

The spelling of 12899899 in words is "twelve million, eight hundred ninety-nine thousand, eight hundred ninety-nine".