493409 has 4 divisors (see below), whose sum is σ = 563904. Its totient is φ = 422916.

The previous prime is 493403. The next prime is 493433. The reversal of 493409 is 904394.

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 493409 - 2⁴ = 493393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (493403) 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, 35237 + ... + 35250.

It is an arithmetic number, because the mean of its divisors is an integer number (140976).

2⁴⁹³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

493409 is a deficient number, since it is larger than the sum of its proper divisors (70495).

493409 is an equidigital number, since it uses as much as digits as its factorization.

493409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70494.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 493409 is about 702.4307795078. The cubic root of 493409 is about 79.0197568490.

The spelling of 493409 in words is "four hundred ninety-three thousand, four hundred nine".