9996979999 has 4 divisors (see below), whose sum is σ = 10585037664. Its totient is φ = 9408922336.

The previous prime is 9996979997. The next prime is 9996980011. The reversal of 9996979999 is 9999796999.

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 9996979999 - 2¹ = 9996979997 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 (9996979997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294028807 + ... + 294028840.

It is an arithmetic number, because the mean of its divisors is an integer number (2646259416).

Almost surely, 2^9996979999 is an apocalyptic number.

9996979999 is a deficient number, since it is larger than the sum of its proper divisors (588057665).

9996979999 is a wasteful number, since it uses less digits than its factorization.

9996979999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588057664.

The product of its digits is 1807962282, while the sum is 85.

The square root of 9996979999 is about 99984.8988547771. The cubic root of 9996979999 is about 2154.2177883650.

The spelling of 9996979999 in words is "nine billion, nine hundred ninety-six million, nine hundred seventy-nine thousand, nine hundred ninety-nine".