8712971647 has 2 divisors, whose sum is σ = 8712971648. Its totient is φ = 8712971646.

The previous prime is 8712971633. The next prime is 8712971653. The reversal of 8712971647 is 7461792178.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8712971647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8712971594 and 8712971603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8712971627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4356485823 + 4356485824.

It is an arithmetic number, because the mean of its divisors is an integer number (4356485824).

Almost surely, 2^8712971647 is an apocalyptic number.

8712971647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8712971647 is an equidigital number, since it uses as much as digits as its factorization.

8712971647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 52.

The square root of 8712971647 is about 93343.2999577367. The cubic root of 8712971647 is about 2057.7317893559.

The spelling of 8712971647 in words is "eight billion, seven hundred twelve million, nine hundred seventy-one thousand, six hundred forty-seven".