8712971637 has 4 divisors (see below), whose sum is σ = 11617295520. Its totient is φ = 5808647756.

The previous prime is 8712971633. The next prime is 8712971647. The reversal of 8712971637 is 7361792178.

8712971637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8712971637 - 2² = 8712971633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8712971637.

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, 1452161937 + ... + 1452161942.

It is an arithmetic number, because the mean of its divisors is an integer number (2904323880).

Almost surely, 2^8712971637 is an apocalyptic number.

It is an amenable number.

8712971637 is a deficient number, since it is larger than the sum of its proper divisors (2904323883).

8712971637 is a wasteful number, since it uses less digits than its factorization.

8712971637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904323882.

The product of its digits is 889056, while the sum is 51.

The square root of 8712971637 is about 93343.2999041709. The cubic root of 8712971637 is about 2057.7317885687.

It can be divided in two parts, 87129 and 71637, that added together give a triangular number (158766 = T₅₆₃).

The spelling of 8712971637 in words is "eight billion, seven hundred twelve million, nine hundred seventy-one thousand, six hundred thirty-seven".