8678631817 has 2 divisors, whose sum is σ = 8678631818. Its totient is φ = 8678631816.

The previous prime is 8678631811. The next prime is 8678631823. The reversal of 8678631817 is 7181368768.

It is a balanced prime because it is at equal distance from previous prime (8678631811) and next prime (8678631823).

It can be written as a sum of positive squares in only one way, i.e., 8655697296 + 22934521 = 93036^2 + 4789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8678631817 is a prime.

It is not a weakly prime, because it can be changed into another prime (8678631811) 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, 4339315908 + 4339315909.

It is an arithmetic number, because the mean of its divisors is an integer number (4339315909).

Almost surely, 2^8678631817 is an apocalyptic number.

It is an amenable number.

8678631817 is a deficient number, since it is larger than the sum of its proper divisors (1).

8678631817 is an equidigital number, since it uses as much as digits as its factorization.

8678631817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 55.

The square root of 8678631817 is about 93159.1746260131. The cubic root of 8678631817 is about 2055.0248982801.

The spelling of 8678631817 in words is "eight billion, six hundred seventy-eight million, six hundred thirty-one thousand, eight hundred seventeen".