99388799989 has 2 divisors, whose sum is σ = 99388799990. Its totient is φ = 99388799988.

The previous prime is 99388799947. The next prime is 99388800011. The reversal of 99388799989 is 98999788399.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97900152100 + 1488647889 = 312890^2 + 38583^2 .

It is an emirp because it is prime and its reverse (98999788399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99388799989 - 2²⁵ = 99355245557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99388799089) 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 as a sum of consecutive naturals, namely, 49694399994 + 49694399995.

It is an arithmetic number, because the mean of its divisors is an integer number (49694399995).

Almost surely, 2^99388799989 is an apocalyptic number.

It is an amenable number.

99388799989 is a deficient number, since it is larger than the sum of its proper divisors (1).

99388799989 is an equidigital number, since it uses as much as digits as its factorization.

99388799989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5714053632, while the sum is 88.

The spelling of 99388799989 in words is "ninety-nine billion, three hundred eighty-eight million, seven hundred ninety-nine thousand, nine hundred eighty-nine".