9999878579 has 2 divisors, whose sum is σ = 9999878580. Its totient is φ = 9999878578.

The previous prime is 9999878561. The next prime is 9999878597. The reversal of 9999878579 is 9758789999.

It is a happy number.

Together with next prime (9999878597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (9999878561) and next prime (9999878597).

It is a cyclic number.

It is not a de Polignac number, because 9999878579 - 2¹² = 9999874483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9999878549) 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, 4999939289 + 4999939290.

It is an arithmetic number, because the mean of its divisors is an integer number (4999939290).

Almost surely, 2^9999878579 is an apocalyptic number.

9999878579 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999878579 is an equidigital number, since it uses as much as digits as its factorization.

9999878579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 925888320, while the sum is 80.

The square root of 9999878579 is about 99999.3928931571. The cubic root of 9999878579 is about 2154.4259702094.

The spelling of 9999878579 in words is "nine billion, nine hundred ninety-nine million, eight hundred seventy-eight thousand, five hundred seventy-nine".