99988289 has 2 divisors, whose sum is σ = 99988290. Its totient is φ = 99988288.

The previous prime is 99988277. The next prime is 99988313. The reversal of 99988289 is 98288999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99840064 + 148225 = 9992^2 + 385^2 .

It is an emirp because it is prime and its reverse (98288999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99988289 is a prime.

It is not a weakly prime, because it can be changed into another prime (99988219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994144 + 49994145.

It is an arithmetic number, because the mean of its divisors is an integer number (49994145).

Almost surely, 2^99988289 is an apocalyptic number.

It is an amenable number.

99988289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988289 is an equidigital number, since it uses as much as digits as its factorization.

99988289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 62.

The square root of 99988289 is about 9999.4144328556. The cubic root of 99988289 is about 464.1407634383.

The spelling of 99988289 in words is "ninety-nine million, nine hundred eighty-eight thousand, two hundred eighty-nine".