9979798 has 8 divisors (see below), whose sum is σ = 15027408. Its totient is φ = 4970664.

The previous prime is 9979789. The next prime is 9979811. The reversal of 9979798 is 8979799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8961 + ... + 10012.

It is an arithmetic number, because the mean of its divisors is an integer number (1878426).

Almost surely, 2^9979798 is an apocalyptic number.

9979798 is a deficient number, since it is larger than the sum of its proper divisors (5047610).

9979798 is a wasteful number, since it uses less digits than its factorization.

9979798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19238.

The product of its digits is 2571912, while the sum is 58.

The square root of 9979798 is about 3159.0818286331. The cubic root of 9979798 is about 215.2982915647.

Subtracting from 9979798 its reverse (8979799), we obtain a palindrome (999999).

It can be divided in two parts, 99 and 79798, that added together give a palindrome (79897).

The spelling of 9979798 in words is "nine million, nine hundred seventy-nine thousand, seven hundred ninety-eight".