499491 has 24 divisors (see below), whose sum is σ = 798720. Its totient is φ = 299376.

The previous prime is 499483. The next prime is 499493. The reversal of 499491 is 194994.

It is not a de Polignac number, because 499491 - 2³ = 499483 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 499491.

It is not an unprimeable number, because it can be changed into a prime (499493) 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, 3870 + ... + 3996.

It is an arithmetic number, because the mean of its divisors is an integer number (33280).

2⁴⁹⁹⁴⁹¹ is an apocalyptic number.

499491 is a deficient number, since it is larger than the sum of its proper divisors (299229).

499491 is a wasteful number, since it uses less digits than its factorization.

499491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 172 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 499491 is about 706.7467721893. The cubic root of 499491 is about 79.3431105495.

It can be divided in two parts, 4994 and 91, that multiplied together give a palindrome (454454).

The spelling of 499491 in words is "four hundred ninety-nine thousand, four hundred ninety-one".