495309 has 4 divisors (see below), whose sum is σ = 660416. Its totient is φ = 330204.

The previous prime is 495307. The next prime is 495323. The reversal of 495309 is 903594.

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 not a de Polignac number, because 495309 - 2¹ = 495307 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495301) 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, 82549 + ... + 82554.

It is an arithmetic number, because the mean of its divisors is an integer number (165104).

2⁴⁹⁵³⁰⁹ is an apocalyptic number.

It is an amenable number.

495309 is a deficient number, since it is larger than the sum of its proper divisors (165107).

495309 is a wasteful number, since it uses less digits than its factorization.

495309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165106.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 495309 is about 703.7819264517. The cubic root of 495309 is about 79.1210556597.

The spelling of 495309 in words is "four hundred ninety-five thousand, three hundred nine".