12997899 has 12 divisors (see below), whose sum is σ = 19040112. Its totient is φ = 8542800.

The previous prime is 12997849. The next prime is 12997909. The reversal of 12997899 is 99879921.

It is not a de Polignac number, because 12997899 - 2¹² = 12993803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12997849) 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 in 11 ways as a sum of consecutive naturals, for example, 9532 + ... + 10809.

It is an arithmetic number, because the mean of its divisors is an integer number (1586676).

Almost surely, 2^12997899 is an apocalyptic number.

12997899 is a deficient number, since it is larger than the sum of its proper divisors (6042213).

12997899 is a wasteful number, since it uses less digits than its factorization.

12997899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20418 (or 20415 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 12997899 is about 3605.2599074131. The cubic root of 12997899 is about 235.1208010276.

The spelling of 12997899 in words is "twelve million, nine hundred ninety-seven thousand, eight hundred ninety-nine".