9979910099 has 4 divisors (see below), whose sum is σ = 10324044960. Its totient is φ = 9635775240.

The previous prime is 9979910089. The next prime is 9979910107. The reversal of 9979910099 is 9900199799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9979910099 - 2¹² = 9979906003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9979910029) 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 3 ways as a sum of consecutive naturals, for example, 172067387 + ... + 172067444.

It is an arithmetic number, because the mean of its divisors is an integer number (2581011240).

Almost surely, 2^9979910099 is an apocalyptic number.

9979910099 is a deficient number, since it is larger than the sum of its proper divisors (344134861).

9979910099 is a wasteful number, since it uses less digits than its factorization.

9979910099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344134860.

The product of its (nonzero) digits is 3720087, while the sum is 62.

The square root of 9979910099 is about 99899.4999937437. The cubic root of 9979910099 is about 2152.9909768102.

The spelling of 9979910099 in words is "nine billion, nine hundred seventy-nine million, nine hundred ten thousand, ninety-nine".