8715872309 has 4 divisors (see below), whose sum is σ = 9016419660. Its totient is φ = 8415324960.

The previous prime is 8715872293. The next prime is 8715872317. The reversal of 8715872309 is 9032785178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4112656900 + 4603215409 = 64130^2 + 67847^2 .

It is a cyclic number.

It is not a de Polignac number, because 8715872309 - 2⁴ = 8715872293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8715872369) 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, 150273632 + ... + 150273689.

It is an arithmetic number, because the mean of its divisors is an integer number (2254104915).

Almost surely, 2^8715872309 is an apocalyptic number.

It is an amenable number.

8715872309 is a deficient number, since it is larger than the sum of its proper divisors (300547351).

8715872309 is a wasteful number, since it uses less digits than its factorization.

8715872309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300547350.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 8715872309 is about 93358.8362663117. The cubic root of 8715872309 is about 2057.9601126119.

The spelling of 8715872309 in words is "eight billion, seven hundred fifteen million, eight hundred seventy-two thousand, three hundred nine".