490839 has 4 divisors (see below), whose sum is σ = 654456. Its totient is φ = 327224.

The previous prime is 490837. The next prime is 490849. The reversal of 490839 is 938094.

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

It is a cyclic number.

It is not a de Polignac number, because 490839 - 2¹ = 490837 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490837) 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, 81804 + ... + 81809.

It is an arithmetic number, because the mean of its divisors is an integer number (163614).

2⁴⁹⁰⁸³⁹ is an apocalyptic number.

490839 is a deficient number, since it is larger than the sum of its proper divisors (163617).

490839 is a wasteful number, since it uses less digits than its factorization.

490839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163616.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 490839 is about 700.5990294027. The cubic root of 490839 is about 78.8823222583.

The spelling of 490839 in words is "four hundred ninety thousand, eight hundred thirty-nine".