500491 has 4 divisors (see below), whose sum is σ = 504000. Its totient is φ = 496984.

The previous prime is 500483. The next prime is 500501. The reversal of 500491 is 194005.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 500491 - 2³ = 500483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2⁵⁰⁰⁴⁹¹ is an apocalyptic number.

500491 is a deficient number, since it is larger than the sum of its proper divisors (3509).

500491 is a wasteful number, since it uses less digits than its factorization.

500491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 500491 is about 707.4538854229. The cubic root of 500491 is about 79.3960245627.

Adding to 500491 its reverse (194005), we get a palindrome (694496).

The spelling of 500491 in words is "five hundred thousand, four hundred ninety-one".