998489017 has 8 divisors (see below), whose sum is σ = 1006528392. Its totient is φ = 990460800.

The previous prime is 998488927. The next prime is 998489077. The reversal of 998489017 is 710984899.

It can be written as a sum of positive squares in 4 ways, for example, as 112593321 + 885895696 = 10611^2 + 29764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998489017 - 2¹¹ = 998486969 is a prime.

It is a deceptive number, since it divides R_998489016.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998489077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324667 + ... + 327727.

It is an arithmetic number, because the mean of its divisors is an integer number (125816049).

It is a Poulet number, since it divides 2^998489016-1.

Almost surely, 2^998489017 is an apocalyptic number.

It is an amenable number.

998489017 is a deficient number, since it is larger than the sum of its proper divisors (8039375).

998489017 is a wasteful number, since it uses less digits than its factorization.

998489017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 998489017 is about 31598.8768313053. The cubic root of 998489017 is about 999.4960851124.

The spelling of 998489017 in words is "nine hundred ninety-eight million, four hundred eighty-nine thousand, seventeen".