9988089997 has 2 divisors, whose sum is σ = 9988089998. Its totient is φ = 9988089996.

The previous prime is 9988089971. The next prime is 9988090027. The reversal of 9988089997 is 7999808899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7205632996 + 2782457001 = 84886^2 + 52749^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988089997 - 2¹⁵ = 9988057229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9988089967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994044998 + 4994044999.

It is an arithmetic number, because the mean of its divisors is an integer number (4994044999).

Almost surely, 2^9988089997 is an apocalyptic number.

It is an amenable number.

9988089997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988089997 is an equidigital number, since it uses as much as digits as its factorization.

9988089997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211631616, while the sum is 76.

The square root of 9988089997 is about 99940.4322434119. The cubic root of 9988089997 is about 2153.5790394612.

The spelling of 9988089997 in words is "nine billion, nine hundred eighty-eight million, eighty-nine thousand, nine hundred ninety-seven".