9800999999 has 8 divisors (see below), whose sum is σ = 11202048000. Its totient is φ = 8400178296.

The previous prime is 9800999981. The next prime is 9801000023. The reversal of 9800999999 is 9999990089.

9800999999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 99000²-1.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9800999999 is a prime.

It is a Duffinian number.

9800999999 is a modest number, since divided by 99999 gives 98009 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9800999699) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 49502 + ... + 148500.

It is an arithmetic number, because the mean of its divisors is an integer number (1400256000).

Almost surely, 2^9800999999 is an apocalyptic number.

9800999999 is a deficient number, since it is larger than the sum of its proper divisors (1401048001).

9800999999 is a wasteful number, since it uses less digits than its factorization.

9800999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113149.

The product of its (nonzero) digits is 38263752, while the sum is 71.

The square root of 9800999999 is about 98999.9999949495. Note that the first 5 decimals coincide. The cubic root of 9800999999 is about 2140.0477468457.

The spelling of 9800999999 in words is "nine billion, eight hundred million, nine hundred ninety-nine thousand, nine hundred ninety-nine".