9878579798 has 4 divisors (see below), whose sum is σ = 14817869700. Its totient is φ = 4939289898.

The previous prime is 9878579761. The next prime is 9878579839. The reversal of 9878579798 is 8979758789.

9878579798 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8979758789 = 1579 ⋅5686991.

It is a congruent number.

It is an unprimeable number.

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, 2469644948 + ... + 2469644951.

It is an arithmetic number, because the mean of its divisors is an integer number (3704467425).

Almost surely, 2^9878579798 is an apocalyptic number.

9878579798 is a deficient number, since it is larger than the sum of its proper divisors (4939289902).

9878579798 is a wasteful number, since it uses less digits than its factorization.

9878579798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939289901.

The product of its digits is 640120320, while the sum is 77.

The square root of 9878579798 is about 99391.0448581762. The cubic root of 9878579798 is about 2145.6794284710.

The spelling of 9878579798 in words is "nine billion, eight hundred seventy-eight million, five hundred seventy-nine thousand, seven hundred ninety-eight".