8078538889 has 2 divisors, whose sum is σ = 8078538890. Its totient is φ = 8078538888.

The previous prime is 8078538859. The next prime is 8078538911. The reversal of 8078538889 is 9888358708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6933393289 + 1145145600 = 83267^2 + 33840^2 .

It is a cyclic number.

It is not a de Polignac number, because 8078538889 - 2⁵ = 8078538857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8078538889.

It is not a weakly prime, because it can be changed into another prime (8078538859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4039269444 + 4039269445.

It is an arithmetic number, because the mean of its divisors is an integer number (4039269445).

Almost surely, 2^8078538889 is an apocalyptic number.

It is an amenable number.

8078538889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8078538889 is an equidigital number, since it uses as much as digits as its factorization.

8078538889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30965760, while the sum is 64.

The square root of 8078538889 is about 89880.6925262595. The cubic root of 8078538889 is about 2006.5236055662.

The spelling of 8078538889 in words is "eight billion, seventy-eight million, five hundred thirty-eight thousand, eight hundred eighty-nine".