8727878917 has 2 divisors, whose sum is σ = 8727878918. Its totient is φ = 8727878916.

The previous prime is 8727878879. The next prime is 8727878923. The reversal of 8727878917 is 7198787278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6794869761 + 1933009156 = 82431^2 + 43966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8727878917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8727878927) 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, 4363939458 + 4363939459.

It is an arithmetic number, because the mean of its divisors is an integer number (4363939459).

Almost surely, 2^8727878917 is an apocalyptic number.

It is an amenable number.

8727878917 is a deficient number, since it is larger than the sum of its proper divisors (1).

8727878917 is an equidigital number, since it uses as much as digits as its factorization.

8727878917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22127616, while the sum is 64.

The square root of 8727878917 is about 93423.1176797264. The cubic root of 8727878917 is about 2058.9046645772.

The spelling of 8727878917 in words is "eight billion, seven hundred twenty-seven million, eight hundred seventy-eight thousand, nine hundred seventeen".