9888775427 has 2 divisors, whose sum is σ = 9888775428. Its totient is φ = 9888775426.

The previous prime is 9888775423. The next prime is 9888775433. The reversal of 9888775427 is 7245778889.

9888775427 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 9888775427 - 2² = 9888775423 is a prime.

It is not a weakly prime, because it can be changed into another prime (9888775423) 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, 4944387713 + 4944387714.

It is an arithmetic number, because the mean of its divisors is an integer number (4944387714).

Almost surely, 2^9888775427 is an apocalyptic number.

9888775427 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888775427 is an equidigital number, since it uses as much as digits as its factorization.

9888775427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63221760, while the sum is 65.

The square root of 9888775427 is about 99442.3221118654. The cubic root of 9888775427 is about 2146.4173560524.

The spelling of 9888775427 in words is "nine billion, eight hundred eighty-eight million, seven hundred seventy-five thousand, four hundred twenty-seven".