996503 has 4 divisors (see below), whose sum is σ = 999000. Its totient is φ = 994008.

The previous prime is 996487. The next prime is 996511. The reversal of 996503 is 305699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305699 = 107 ⋅2857.

It is not a de Polignac number, because 996503 - 2⁴ = 996487 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (249750).

2⁹⁹⁶⁵⁰³ is an apocalyptic number.

996503 is a deficient number, since it is larger than the sum of its proper divisors (2497).

996503 is a wasteful number, since it uses less digits than its factorization.

996503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 996503 is about 998.2499686952. The cubic root of 996503 is about 99.8832971909.

The spelling of 996503 in words is "nine hundred ninety-six thousand, five hundred three".