494409 has 8 divisors (see below), whose sum is σ = 666400. Its totient is φ = 326016.

The previous prime is 494407. The next prime is 494413. The reversal of 494409 is 904494.

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

It is not a de Polignac number, because 494409 - 2¹ = 494407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494407) 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, 559 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (83300).

2⁴⁹⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

494409 is a deficient number, since it is larger than the sum of its proper divisors (171991).

494409 is a wasteful number, since it uses less digits than its factorization.

494409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 494409 is about 703.1422331221. The cubic root of 494409 is about 79.0731043648.

It can be divided in two parts, 494 and 409, that added together give a triangular number (903 = T₄₂).

The spelling of 494409 in words is "four hundred ninety-four thousand, four hundred nine".