8777988889 has 2 divisors, whose sum is σ = 8777988890. Its totient is φ = 8777988888.

The previous prime is 8777988871. The next prime is 8777988899. The reversal of 8777988889 is 9888897778.

8777988889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8669099664 + 108889225 = 93108^2 + 10435^2 .

It is a cyclic number.

It is not a de Polignac number, because 8777988889 - 2⁷ = 8777988761 is a prime.

It is not a weakly prime, because it can be changed into another prime (8777988839) 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, 4388994444 + 4388994445.

It is an arithmetic number, because the mean of its divisors is an integer number (4388994445).

Almost surely, 2^8777988889 is an apocalyptic number.

It is an amenable number.

8777988889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8777988889 is an equidigital number, since it uses as much as digits as its factorization.

8777988889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 910393344, while the sum is 79.

The square root of 8777988889 is about 93690.9221269596. The cubic root of 8777988889 is about 2062.8374579711.

The spelling of 8777988889 in words is "eight billion, seven hundred seventy-seven million, nine hundred eighty-eight thousand, eight hundred eighty-nine".