8772128873 has 4 divisors (see below), whose sum is σ = 8785687680. Its totient is φ = 8758570068.

The previous prime is 8772128839. The next prime is 8772128879. The reversal of 8772128873 is 3788212778.

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 a de Polignac number, because none of the positive numbers 2^k-8772128873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8772128879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6778433 + ... + 6779726.

It is an arithmetic number, because the mean of its divisors is an integer number (2196421920).

Almost surely, 2^8772128873 is an apocalyptic number.

It is an amenable number.

8772128873 is a deficient number, since it is larger than the sum of its proper divisors (13558807).

8772128873 is a wasteful number, since it uses less digits than its factorization.

8772128873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558806.

The product of its digits is 2107392, while the sum is 53.

The square root of 8772128873 is about 93659.6437800187. The cubic root of 8772128873 is about 2062.3783189579.

The spelling of 8772128873 in words is "eight billion, seven hundred seventy-two million, one hundred twenty-eight thousand, eight hundred seventy-three".