8721712871 has 2 divisors, whose sum is σ = 8721712872. Its totient is φ = 8721712870.

The previous prime is 8721712849. The next prime is 8721712877. The reversal of 8721712871 is 1782171278.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8721712871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8721712877) 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, 4360856435 + 4360856436.

It is an arithmetic number, because the mean of its divisors is an integer number (4360856436).

Almost surely, 2^8721712871 is an apocalyptic number.

8721712871 is a deficient number, since it is larger than the sum of its proper divisors (1).

8721712871 is an equidigital number, since it uses as much as digits as its factorization.

8721712871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 44.

The square root of 8721712871 is about 93390.1112056303. Note that the first 3 decimals coincide. The cubic root of 8721712871 is about 2058.4196940663.

The spelling of 8721712871 in words is "eight billion, seven hundred twenty-one million, seven hundred twelve thousand, eight hundred seventy-one".