495609 has 4 divisors (see below), whose sum is σ = 660816. Its totient is φ = 330404.

The previous prime is 495589. The next prime is 495611. The reversal of 495609 is 906594.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 495609 - 2¹⁵ = 462841 is a prime.

It is a D-number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 495609.

It is not an unprimeable number, because it can be changed into a prime (495619) 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, 82599 + ... + 82604.

It is an arithmetic number, because the mean of its divisors is an integer number (165204).

2⁴⁹⁵⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

495609 is a deficient number, since it is larger than the sum of its proper divisors (165207).

495609 is a wasteful number, since it uses less digits than its factorization.

495609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165206.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 495609 is about 703.9950283915. The cubic root of 495609 is about 79.1370265156.

It can be divided in two parts, 49560 and 9, that multiplied together give a triangular number (446040 = T₉₄₄).

The spelling of 495609 in words is "four hundred ninety-five thousand, six hundred nine".