99984559 has 2 divisors, whose sum is σ = 99984560. Its totient is φ = 99984558.

The previous prime is 99984541. The next prime is 99984587. The reversal of 99984559 is 95548999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99984559 - 2¹³ = 99976367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99984529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992279 + 49992280.

It is an arithmetic number, because the mean of its divisors is an integer number (49992280).

Almost surely, 2^99984559 is an apocalyptic number.

99984559 is a deficient number, since it is larger than the sum of its proper divisors (1).

99984559 is an equidigital number, since it uses as much as digits as its factorization.

99984559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 58.

The square root of 99984559 is about 9999.2279201946. The cubic root of 99984559 is about 464.1349918738.

It can be divided in two parts, 999 and 84559, that added together give a palindrome (85558).

The spelling of 99984559 in words is "ninety-nine million, nine hundred eighty-four thousand, five hundred fifty-nine".