9888979 has 2 divisors, whose sum is σ = 9888980. Its totient is φ = 9888978.

The previous prime is 9888973. The next prime is 9888997. The reversal of 9888979 is 9798889.

Together with next prime (9888997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9888979 - 2⁵ = 9888947 is a prime.

It is not a weakly prime, because it can be changed into another prime (9888973) 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, 4944489 + 4944490.

It is an arithmetic number, because the mean of its divisors is an integer number (4944490).

Almost surely, 2^9888979 is an apocalyptic number.

9888979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888979 is an equidigital number, since it uses as much as digits as its factorization.

9888979 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9888979 is about 3144.6747049576. The cubic root of 9888979 is about 214.6432084860.

The spelling of 9888979 in words is "nine million, eight hundred eighty-eight thousand, nine hundred seventy-nine".