8645978867 has 2 divisors, whose sum is σ = 8645978868. Its totient is φ = 8645978866.

The previous prime is 8645978857. The next prime is 8645978897. The reversal of 8645978867 is 7688795468.

8645978867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8645978867 - 2²⁰ = 8644930291 is a prime.

It is a super-2 number, since 2×8645978867² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8645978797 and 8645978806.

It is not a weakly prime, because it can be changed into another prime (8645978827) 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 as a sum of consecutive naturals, namely, 4322989433 + 4322989434.

It is an arithmetic number, because the mean of its divisors is an integer number (4322989434).

Almost surely, 2^8645978867 is an apocalyptic number.

8645978867 is a deficient number, since it is larger than the sum of its proper divisors (1).

8645978867 is an equidigital number, since it uses as much as digits as its factorization.

8645978867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162570240, while the sum is 68.

The square root of 8645978867 is about 92983.7559308076. The cubic root of 8645978867 is about 2052.4443471879. Note that the first 3 decimals are identical.

The spelling of 8645978867 in words is "eight billion, six hundred forty-five million, nine hundred seventy-eight thousand, eight hundred sixty-seven".