997513 has 16 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 844480.

The previous prime is 997511. The next prime is 997541. The reversal of 997513 is 315799.

997513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997513 - 2¹ = 997511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16878 + ... + 16936.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁹⁹⁷⁵¹³ is an apocalyptic number.

It is an amenable number.

997513 is a deficient number, since it is larger than the sum of its proper divisors (168887).

997513 is a wasteful number, since it uses less digits than its factorization.

997513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its digits is 8505, while the sum is 34.

The square root of 997513 is about 998.7557258910. The cubic root of 997513 is about 99.9170311808.

The spelling of 997513 in words is "nine hundred ninety-seven thousand, five hundred thirteen".