12947831947 has 2 divisors, whose sum is σ = 12947831948. Its totient is φ = 12947831946.

The previous prime is 12947831929. The next prime is 12947831971. The reversal of 12947831947 is 74913874921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12947831947 is a prime.

It is not a weakly prime, because it can be changed into another prime (12947831917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473915973 + 6473915974.

It is an arithmetic number, because the mean of its divisors is an integer number (6473915974).

Almost surely, 2^12947831947 is an apocalyptic number.

12947831947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947831947 is an equidigital number, since it uses as much as digits as its factorization.

12947831947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 55.

The spelling of 12947831947 in words is "twelve billion, nine hundred forty-seven million, eight hundred thirty-one thousand, nine hundred forty-seven".