9879998 has 8 divisors (see below), whose sum is σ = 14841192. Its totient is φ = 4932936.

The previous prime is 9879997. The next prime is 9880001. The reversal of 9879998 is 8999789.

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

It is a super-2 number, since 2×9879998² = 195228720960008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9879997) 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 in 3 ways as a sum of consecutive naturals, for example, 1565 + ... + 4712.

It is an arithmetic number, because the mean of its divisors is an integer number (1855149).

Almost surely, 2^9879998 is an apocalyptic number.

9879998 is a deficient number, since it is larger than the sum of its proper divisors (4961194).

9879998 is a wasteful number, since it uses less digits than its factorization.

9879998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066.

The product of its digits is 2939328, while the sum is 59.

The square root of 9879998 is about 3143.2464109579. The cubic root of 9879998 is about 214.5782103866.

The spelling of 9879998 in words is "nine million, eight hundred seventy-nine thousand, nine hundred ninety-eight".