99990000009989 has 2 divisors, whose sum is σ = 99990000009990. Its totient is φ = 99990000009988.

The previous prime is 99990000009941. The next prime is 99990000010031. The reversal of 99990000009989 is 98990000009999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99063045053764 + 926954956225 = 9953042^2 + 962785^2 .

It is a cyclic number.

It is not a de Polignac number, because 99990000009989 - 2¹⁶ = 99989999944453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99990000009689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49995000004994 + 49995000004995.

It is an arithmetic number, because the mean of its divisors is an integer number (49995000004995).

Almost surely, 2^{99990000009989} is an apocalyptic number.

It is an amenable number.

99990000009989 is a deficient number, since it is larger than the sum of its proper divisors (1).

99990000009989 is an equidigital number, since it uses as much as digits as its factorization.

99990000009989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38263752, while the sum is 71.

The spelling of 99990000009989 in words is "ninety-nine trillion, nine hundred ninety billion, nine thousand, nine hundred eighty-nine".