9996979997 has 2 divisors, whose sum is σ = 9996979998. Its totient is φ = 9996979996.

The previous prime is 9996979987. The next prime is 9996980011. The reversal of 9996979997 is 7999796999.

9996979997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9750772516 + 246207481 = 98746^2 + 15691^2 .

It is an emirp because it is prime and its reverse (7999796999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9996979997 - 2⁴ = 9996979981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9996979987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998489998 + 4998489999.

It is an arithmetic number, because the mean of its divisors is an integer number (4998489999).

Almost surely, 2^9996979997 is an apocalyptic number.

It is an amenable number.

9996979997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996979997 is an equidigital number, since it uses as much as digits as its factorization.

9996979997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1406192886, while the sum is 83.

The square root of 9996979997 is about 99984.8988447756. The cubic root of 9996979997 is about 2154.2177882214.

The spelling of 9996979997 in words is "nine billion, nine hundred ninety-six million, nine hundred seventy-nine thousand, nine hundred ninety-seven".