997535 has 16 divisors (see below), whose sum is σ = 1492992. Its totient is φ = 621600.

The previous prime is 997511. The next prime is 997541. The reversal of 997535 is 535799.

It is not a de Polignac number, because 997535 - 2⁸ = 997279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 911 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (93312).

2⁹⁹⁷⁵³⁵ is an apocalyptic number.

997535 is a deficient number, since it is larger than the sum of its proper divisors (495457).

997535 is a wasteful number, since it uses less digits than its factorization.

997535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614.

The product of its digits is 42525, while the sum is 38.

The square root of 997535 is about 998.7667395343. The cubic root of 997535 is about 99.9177657271.

The spelling of 997535 in words is "nine hundred ninety-seven thousand, five hundred thirty-five".