518997 has 4 divisors (see below), whose sum is σ = 692000. Its totient is φ = 345996.

The previous prime is 518989. The next prime is 519011. The reversal of 518997 is 799815.

It is a happy number.

518997 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 518997 - 2³ = 518989 is a prime.

It is a D-number.

It is a Duffinian number.

518997 is strictly pandigital in base 7.

518997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518597) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 86497 + ... + 86502.

It is an arithmetic number, because the mean of its divisors is an integer number (173000).

2⁵¹⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

518997 is a deficient number, since it is larger than the sum of its proper divisors (173003).

518997 is a wasteful number, since it uses less digits than its factorization.

518997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173002.

The product of its digits is 22680, while the sum is 39.

The square root of 518997 is about 720.4144640414. The cubic root of 518997 is about 80.3627794847.

The spelling of 518997 in words is "five hundred eighteen thousand, nine hundred ninety-seven".