998603 has 4 divisors (see below), whose sum is σ = 1030848. Its totient is φ = 966360.

The previous prime is 998561. The next prime is 998617. The reversal of 998603 is 306899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998603 - 2⁶ = 998539 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998603.

It is not an unprimeable number, because it can be changed into a prime (998623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16076 + ... + 16137.

It is an arithmetic number, because the mean of its divisors is an integer number (257712).

2⁹⁹⁸⁶⁰³ is an apocalyptic number.

998603 is a deficient number, since it is larger than the sum of its proper divisors (32245).

998603 is a wasteful number, since it uses less digits than its factorization.

998603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32244.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 998603 is about 999.3012558783. The cubic root of 998603 is about 99.9534116319.

The spelling of 998603 in words is "nine hundred ninety-eight thousand, six hundred three".