12947939 has 2 divisors, whose sum is σ = 12947940. Its totient is φ = 12947938.

The previous prime is 12947933. The next prime is 12947941. The reversal of 12947939 is 93974921.

12947939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12947939 is a prime.

Together with 12947941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12947939.

It is not a weakly prime, because it can be changed into another prime (12947933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473969 + 6473970.

It is an arithmetic number, because the mean of its divisors is an integer number (6473970).

Almost surely, 2^12947939 is an apocalyptic number.

12947939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947939 is an equidigital number, since it uses as much as digits as its factorization.

12947939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 12947939 is about 3598.3244711949. The cubic root of 12947939 is about 234.8191697765.

The spelling of 12947939 in words is "twelve million, nine hundred forty-seven thousand, nine hundred thirty-nine".