494309 has 4 divisors (see below), whose sum is σ = 523404. Its totient is φ = 465216.

The previous prime is 494287. The next prime is 494317. The reversal of 494309 is 903494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903494 = 2 ⋅451747.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 103684 = 625^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494309 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14522 + ... + 14555.

It is an arithmetic number, because the mean of its divisors is an integer number (130851).

2⁴⁹⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

494309 is a deficient number, since it is larger than the sum of its proper divisors (29095).

494309 is a wasteful number, since it uses less digits than its factorization.

494309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29094.

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

The square root of 494309 is about 703.0711201578. The cubic root of 494309 is about 79.0677728521.

The spelling of 494309 in words is "four hundred ninety-four thousand, three hundred nine".