495639 has 20 divisors (see below), whose sum is σ = 769560. Its totient is φ = 317520.

The previous prime is 495637. The next prime is 495647. The reversal of 495639 is 936594.

It is not a de Polignac number, because 495639 - 2¹ = 495637 is a prime.

Its product of digits (29160) is a multiple of the sum of its prime divisors (243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495637) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2244 + ... + 2454.

It is an arithmetic number, because the mean of its divisors is an integer number (38478).

2⁴⁹⁵⁶³⁹ is an apocalyptic number.

495639 is a deficient number, since it is larger than the sum of its proper divisors (273921).

495639 is a wasteful number, since it uses less digits than its factorization.

495639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 243 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 495639 is about 704.0163350378. The cubic root of 495639 is about 79.1386232467.

The spelling of 495639 in words is "four hundred ninety-five thousand, six hundred thirty-nine".