997533 has 24 divisors (see below), whose sum is σ = 1547520. Its totient is φ = 617760.

The previous prime is 997511. The next prime is 997541. The reversal of 997533 is 335799.

It is not a de Polignac number, because 997533 - 2⁹ = 997021 is a prime.

It is a nialpdrome in base 10.

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 23 ways as a sum of consecutive naturals, for example, 12588 + ... + 12666.

It is an arithmetic number, because the mean of its divisors is an integer number (64480).

2⁹⁹⁷⁵³³ is an apocalyptic number.

It is an amenable number.

997533 is a deficient number, since it is larger than the sum of its proper divisors (549987).

997533 is a wasteful number, since it uses less digits than its factorization.

997533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 166 counting only the distinct ones).

The product of its digits is 25515, while the sum is 36.

The square root of 997533 is about 998.7657382990. The cubic root of 997533 is about 99.9176989506.

The spelling of 997533 in words is "nine hundred ninety-seven thousand, five hundred thirty-three".