493309 has 4 divisors (see below), whose sum is σ = 494716. Its totient is φ = 491904.

The previous prime is 493301. The next prime is 493313. The reversal of 493309 is 903394.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 136900 = 597^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 493309 - 2³ = 493301 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 (493301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (123679).

2⁴⁹³³⁰⁹ is an apocalyptic number.

It is an amenable number.

493309 is a deficient number, since it is larger than the sum of its proper divisors (1407).

493309 is an equidigital number, since it uses as much as digits as its factorization.

493309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 493309 is about 702.3595945098. The cubic root of 493309 is about 79.0144181343.

The spelling of 493309 in words is "four hundred ninety-three thousand, three hundred nine".