8721712863 has 12 divisors (see below), whose sum is σ = 12603459960. Its totient is φ = 5811968976.

The previous prime is 8721712849. The next prime is 8721712871. The reversal of 8721712863 is 3682171278.

It is not a de Polignac number, because 8721712863 - 2⁸ = 8721712607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721712463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186693 + ... + 228686.

It is an arithmetic number, because the mean of its divisors is an integer number (1050288330).

Almost surely, 2^8721712863 is an apocalyptic number.

8721712863 is a deficient number, since it is larger than the sum of its proper divisors (3881747097).

8721712863 is a wasteful number, since it uses less digits than its factorization.

8721712863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417718 (or 417715 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 8721712863 is about 93390.1111627992. Note that the first 4 decimals coincide. The cubic root of 8721712863 is about 2058.4196934370.

The spelling of 8721712863 in words is "eight billion, seven hundred twenty-one million, seven hundred twelve thousand, eight hundred sixty-three".