499823 has 4 divisors (see below), whose sum is σ = 501480. Its totient is φ = 498168.

The previous prime is 499819. The next prime is 499853. The reversal of 499823 is 328994.

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 499823 - 2² = 499819 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233 + ... + 1026.

It is an arithmetic number, because the mean of its divisors is an integer number (125370).

2⁴⁹⁹⁸²³ is an apocalyptic number.

499823 is a deficient number, since it is larger than the sum of its proper divisors (1657).

499823 is a wasteful number, since it uses less digits than its factorization.

499823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 15552, while the sum is 35.

The square root of 499823 is about 706.9816122078. The cubic root of 499823 is about 79.3606858268.

The spelling of 499823 in words is "four hundred ninety-nine thousand, eight hundred twenty-three".