998548559 has 2 divisors, whose sum is σ = 998548560. Its totient is φ = 998548558.

The previous prime is 998548543. The next prime is 998548687. The reversal of 998548559 is 955845899.

998548559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (955845899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998548559 - 2⁴ = 998548543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998518559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499274279 + 499274280.

It is an arithmetic number, because the mean of its divisors is an integer number (499274280).

Almost surely, 2^998548559 is an apocalyptic number.

998548559 is a deficient number, since it is larger than the sum of its proper divisors (1).

998548559 is an equidigital number, since it uses as much as digits as its factorization.

998548559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328000, while the sum is 62.

The square root of 998548559 is about 31599.8189710005. The cubic root of 998548559 is about 999.5159520687.

The spelling of 998548559 in words is "nine hundred ninety-eight million, five hundred forty-eight thousand, five hundred fifty-nine".