12947771 has 2 divisors, whose sum is σ = 12947772. Its totient is φ = 12947770.

The previous prime is 12947731. The next prime is 12947789. The reversal of 12947771 is 17774921.

12947771 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-12947771 is a prime.

It is not a weakly prime, because it can be changed into another prime (12947731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473885 + 6473886.

It is an arithmetic number, because the mean of its divisors is an integer number (6473886).

Almost surely, 2^12947771 is an apocalyptic number.

12947771 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947771 is an equidigital number, since it uses as much as digits as its factorization.

12947771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 12947771 is about 3598.3011269209. The cubic root of 12947771 is about 234.8181541762.

The spelling of 12947771 in words is "twelve million, nine hundred forty-seven thousand, seven hundred seventy-one".