12943939 has 4 divisors (see below), whose sum is σ = 13126320. Its totient is φ = 12761560.

The previous prime is 12943927. The next prime is 12943949. The reversal of 12943939 is 93934921.

12943939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12943939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12943949) 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, 91084 + ... + 91225.

It is an arithmetic number, because the mean of its divisors is an integer number (3281580).

Almost surely, 2^12943939 is an apocalyptic number.

12943939 is a deficient number, since it is larger than the sum of its proper divisors (182381).

12943939 is an equidigital number, since it uses as much as digits as its factorization.

12943939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182380.

The product of its digits is 52488, while the sum is 40.

The square root of 12943939 is about 3597.7686140162. The cubic root of 12943939 is about 234.7949864317.

The spelling of 12943939 in words is "twelve million, nine hundred forty-three thousand, nine hundred thirty-nine".