12643299 has 6 divisors (see below), whose sum is σ = 18262556. Its totient is φ = 8428860.

The previous prime is 12643283. The next prime is 12643313. The reversal of 12643299 is 99234621.

12643299 is a `hidden beast` number, since 1 + 2 + 643 + 2 + 9 + 9 = 666.

It is not a de Polignac number, because 12643299 - 2⁴ = 12643283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643249) 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 in 5 ways as a sum of consecutive naturals, for example, 702397 + ... + 702414.

Almost surely, 2^12643299 is an apocalyptic number.

12643299 is a deficient number, since it is larger than the sum of its proper divisors (5619257).

12643299 is a wasteful number, since it uses less digits than its factorization.

12643299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404817 (or 1404814 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 12643299 is about 3555.7416947804. The cubic root of 12643299 is about 232.9629209049.

The spelling of 12643299 in words is "twelve million, six hundred forty-three thousand, two hundred ninety-nine".