494391 has 8 divisors (see below), whose sum is σ = 663040. Its totient is φ = 327672.

The previous prime is 494387. The next prime is 494407. The reversal of 494391 is 193494.

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

It is not a de Polignac number, because 494391 - 2² = 494387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 494391.

It is not an unprimeable number, because it can be changed into a prime (494341) 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, 300 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (82880).

2⁴⁹⁴³⁹¹ is an apocalyptic number.

494391 is a deficient number, since it is larger than the sum of its proper divisors (168649).

494391 is a wasteful number, since it uses less digits than its factorization.

494391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its digits is 3888, while the sum is 30.

The square root of 494391 is about 703.1294333194. The cubic root of 494391 is about 79.0721447456.

It can be divided in two parts, 4 and 94391, that added together give a triangular number (94395 = T₄₃₄).

The spelling of 494391 in words is "four hundred ninety-four thousand, three hundred ninety-one".