493909 has 4 divisors (see below), whose sum is σ = 531916. Its totient is φ = 455904.

The previous prime is 493897. The next prime is 493919. The reversal of 493909 is 909394.

493909 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34225 + 459684 = 185^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 493909 - 2⁵ = 493877 is a prime.

It is a super-3 number, since 3×493909³ = 361461523331065287, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493919) 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, 18984 + ... + 19009.

It is an arithmetic number, because the mean of its divisors is an integer number (132979).

2⁴⁹³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

493909 is a deficient number, since it is larger than the sum of its proper divisors (38007).

493909 is a wasteful number, since it uses less digits than its factorization.

493909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38006.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 493909 is about 702.7865963434. The cubic root of 493909 is about 79.0464396078.

The spelling of 493909 in words is "four hundred ninety-three thousand, nine hundred nine".