12729983 has 4 divisors (see below), whose sum is σ = 14548560. Its totient is φ = 10911408.

The previous prime is 12729979. The next prime is 12730007. The reversal of 12729983 is 38992721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38992721 = 2801 ⋅13921.

It is a cyclic number.

It is not a de Polignac number, because 12729983 - 2² = 12729979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12729983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12729973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909278 + ... + 909291.

It is an arithmetic number, because the mean of its divisors is an integer number (3637140).

Almost surely, 2^12729983 is an apocalyptic number.

12729983 is a deficient number, since it is larger than the sum of its proper divisors (1818577).

12729983 is an equidigital number, since it uses as much as digits as its factorization.

12729983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818576.

The product of its digits is 54432, while the sum is 41.

The square root of 12729983 is about 3567.9101726361. The cubic root of 12729983 is about 233.4941161682.

The spelling of 12729983 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred eighty-three".