12899943 has 24 divisors (see below), whose sum is σ = 21560448. Its totient is φ = 7279632.

The previous prime is 12899899. The next prime is 12899951. The reversal of 12899943 is 34999821.

It is not a de Polignac number, because 12899943 - 2⁸ = 12899687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899143) 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 23 ways as a sum of consecutive naturals, for example, 3996 + ... + 6462.

It is an arithmetic number, because the mean of its divisors is an integer number (898352).

Almost surely, 2^12899943 is an apocalyptic number.

12899943 is a deficient number, since it is larger than the sum of its proper divisors (8660505).

12899943 is a wasteful number, since it uses less digits than its factorization.

12899943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563 (or 2560 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 12899943 is about 3591.6490641487. The cubic root of 12899943 is about 234.5286644569.

The spelling of 12899943 in words is "twelve million, eight hundred ninety-nine thousand, nine hundred forty-three".