8647284869 has 2 divisors, whose sum is σ = 8647284870. Its totient is φ = 8647284868.

The previous prime is 8647284857. The next prime is 8647284871. The reversal of 8647284869 is 9684827468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5060472769 + 3586812100 = 71137^2 + 59890^2 .

It is a cyclic number.

It is not a de Polignac number, because 8647284869 - 2²⁴ = 8630507653 is a prime.

It is a super-2 number, since 2×8647284869² (a number of 21 digits) contains 22 as substring.

Together with 8647284871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8647284829) 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 as a sum of consecutive naturals, namely, 4323642434 + 4323642435.

It is an arithmetic number, because the mean of its divisors is an integer number (4323642435).

Almost surely, 2^8647284869 is an apocalyptic number.

It is an amenable number.

8647284869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8647284869 is an equidigital number, since it uses as much as digits as its factorization.

8647284869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 62.

The square root of 8647284869 is about 92990.7784083992. The cubic root of 8647284869 is about 2052.5476846858.

The spelling of 8647284869 in words is "eight billion, six hundred forty-seven million, two hundred eighty-four thousand, eight hundred sixty-nine".