9988879 has 2 divisors, whose sum is σ = 9988880. Its totient is φ = 9988878.

The previous prime is 9988873. The next prime is 9988907. The reversal of 9988879 is 9788899.

9988879 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 an emirp because it is prime and its reverse (9788899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9988879 - 2¹¹ = 9986831 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9988873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994439 + 4994440.

It is an arithmetic number, because the mean of its divisors is an integer number (4994440).

Almost surely, 2^9988879 is an apocalyptic number.

9988879 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988879 is an equidigital number, since it uses as much as digits as its factorization.

9988879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 58.

The square root of 9988879 is about 3160.5187865286. The cubic root of 9988879 is about 215.3635744850.

The spelling of 9988879 in words is "nine million, nine hundred eighty-eight thousand, eight hundred seventy-nine".