9998559 has 10 divisors (see below), whose sum is σ = 14936240. Its totient is φ = 6665652.

The previous prime is 9998557. The next prime is 9998561. The reversal of 9998559 is 9558999.

9998559 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9998557) and next prime (9998561).

It is not a de Polignac number, because 9998559 - 2¹ = 9998557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998557) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61639 + ... + 61800.

It is an arithmetic number, because the mean of its divisors is an integer number (1493624).

Almost surely, 2^9998559 is an apocalyptic number.

9998559 is a deficient number, since it is larger than the sum of its proper divisors (4937681).

9998559 is a wasteful number, since it uses less digits than its factorization.

9998559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123451 (or 123442 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 54.

The square root of 9998559 is about 3162.0498098544. The cubic root of 9998559 is about 215.4331200381.

The spelling of 9998559 in words is "nine million, nine hundred ninety-eight thousand, five hundred fifty-nine".