8647398879 has 16 divisors (see below), whose sum is σ = 13179598848. Its totient is φ = 4940392032.

The previous prime is 8647398841. The next prime is 8647398899. The reversal of 8647398879 is 9788937468.

It is not a de Polignac number, because 8647398879 - 2¹⁹ = 8646874591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8647398899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75469 + ... + 151625.

It is an arithmetic number, because the mean of its divisors is an integer number (823724928).

Almost surely, 2^8647398879 is an apocalyptic number.

8647398879 is a deficient number, since it is larger than the sum of its proper divisors (4532199969).

8647398879 is a wasteful number, since it uses less digits than its factorization.

8647398879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81574.

The product of its digits is 146313216, while the sum is 69.

The square root of 8647398879 is about 92991.3914241528. The cubic root of 8647398879 is about 2052.5567052410.

The spelling of 8647398879 in words is "eight billion, six hundred forty-seven million, three hundred ninety-eight thousand, eight hundred seventy-nine".