493809 has 8 divisors (see below), whose sum is σ = 662112. Its totient is φ = 327360.

The previous prime is 493807. The next prime is 493811. The reversal of 493809 is 908394.

It is an interprime number because it is at equal distance from previous prime (493807) and next prime (493811).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 493809 - 2¹ = 493807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382 + ... + 1064.

It is an arithmetic number, because the mean of its divisors is an integer number (82764).

2⁴⁹³⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

493809 is a deficient number, since it is larger than the sum of its proper divisors (168303).

493809 is a wasteful number, since it uses less digits than its factorization.

493809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 493809 is about 702.7154473896. The cubic root of 493809 is about 79.0411044972.

The spelling of 493809 in words is "four hundred ninety-three thousand, eight hundred nine".