8712971638 has 8 divisors (see below), whose sum is σ = 14936522832. Its totient is φ = 3734130696.

The previous prime is 8712971633. The next prime is 8712971647. The reversal of 8712971638 is 8361792178.

8712971638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8712971633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311177545 + ... + 311177572.

It is an arithmetic number, because the mean of its divisors is an integer number (1867065354).

Almost surely, 2^8712971638 is an apocalyptic number.

8712971638 is a deficient number, since it is larger than the sum of its proper divisors (6223551194).

8712971638 is a wasteful number, since it uses less digits than its factorization.

8712971638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622355126.

The product of its digits is 1016064, while the sum is 52.

The square root of 8712971638 is about 93343.2999095275. The cubic root of 8712971638 is about 2057.7317886474.

The spelling of 8712971638 in words is "eight billion, seven hundred twelve million, nine hundred seventy-one thousand, six hundred thirty-eight".