495823 has 4 divisors (see below), whose sum is σ = 498960. Its totient is φ = 492688.

The previous prime is 495821. The next prime is 495827. The reversal of 495823 is 328594.

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 495823 - 2¹ = 495821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495821) 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, 1318 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2⁴⁹⁵⁸²³ is an apocalyptic number.

495823 is a deficient number, since it is larger than the sum of its proper divisors (3137).

495823 is a wasteful number, since it uses less digits than its factorization.

495823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136.

The product of its digits is 8640, while the sum is 31.

The square root of 495823 is about 704.1470016978. The cubic root of 495823 is about 79.1484151215.

The spelling of 495823 in words is "four hundred ninety-five thousand, eight hundred twenty-three".