9980209799 has 6 divisors (see below), whose sum is σ = 11609631864. Its totient is φ = 8554465500.

The previous prime is 9980209777. The next prime is 9980209847. The reversal of 9980209799 is 9979020899.

It is a de Polignac number, because none of the positive numbers 2^k-9980209799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980209739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101838827 + ... + 101838924.

It is an arithmetic number, because the mean of its divisors is an integer number (1934938644).

Almost surely, 2^9980209799 is an apocalyptic number.

9980209799 is a deficient number, since it is larger than the sum of its proper divisors (1629422065).

9980209799 is a wasteful number, since it uses less digits than its factorization.

9980209799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203677765 (or 203677758 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 62.

The square root of 9980209799 is about 99900.9999899901. Note that the first 4 decimals coincide. The cubic root of 9980209799 is about 2153.0125282714.

The spelling of 9980209799 in words is "nine billion, nine hundred eighty million, two hundred nine thousand, seven hundred ninety-nine".