989503 has 4 divisors (see below), whose sum is σ = 996208. Its totient is φ = 982800.

The previous prime is 989479. The next prime is 989507. The reversal of 989503 is 305989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305989 = 67 ⋅4567.

It is a cyclic number.

It is not a de Polignac number, because 989503 - 2¹³ = 981311 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 (989507) 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, 3126 + ... + 3427.

It is an arithmetic number, because the mean of its divisors is an integer number (249052).

2⁹⁸⁹⁵⁰³ is an apocalyptic number.

989503 is a deficient number, since it is larger than the sum of its proper divisors (6705).

989503 is a wasteful number, since it uses less digits than its factorization.

989503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 989503 is about 994.7376538565. The cubic root of 989503 is about 99.6488685098.

The spelling of 989503 in words is "nine hundred eighty-nine thousand, five hundred three".