99989239289 has 2 divisors, whose sum is σ = 99989239290. Its totient is φ = 99989239288.

The previous prime is 99989239247. The next prime is 99989239309. The reversal of 99989239289 is 98293298999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55133388025 + 44855851264 = 234805^2 + 211792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99989239289 is a prime.

It is not a weakly prime, because it can be changed into another prime (99989239219) 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, 49994619644 + 49994619645.

It is an arithmetic number, because the mean of its divisors is an integer number (49994619645).

Almost surely, 2^99989239289 is an apocalyptic number.

It is an amenable number.

99989239289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989239289 is an equidigital number, since it uses as much as digits as its factorization.

99989239289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408146688, while the sum is 77.

The spelling of 99989239289 in words is "ninety-nine billion, nine hundred eighty-nine million, two hundred thirty-nine thousand, two hundred eighty-nine".