997503 has 8 divisors (see below), whose sum is σ = 1432368. Its totient is φ = 613824.

The previous prime is 997463. The next prime is 997511. The reversal of 997503 is 305799.

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

It is not a de Polignac number, because 997503 - 2⁶ = 997439 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12750 + ... + 12827.

It is an arithmetic number, because the mean of its divisors is an integer number (179046).

2⁹⁹⁷⁵⁰³ is an apocalyptic number.

997503 is a deficient number, since it is larger than the sum of its proper divisors (434865).

997503 is a wasteful number, since it uses less digits than its factorization.

997503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25593.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 997503 is about 998.7507196493. The cubic root of 997503 is about 99.9166972925.

The spelling of 997503 in words is "nine hundred ninety-seven thousand, five hundred three".