490709 has 4 divisors (see below), whose sum is σ = 507660. Its totient is φ = 473760.

The previous prime is 490697. The next prime is 490733. The reversal of 490709 is 907094.

490709 = T₁₀₀ + T₁₀₁ + ... + T₁₅₇.

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

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 184900 = 553^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 490709 - 2⁸ = 490453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 16921 = 490709 / (4 + 9 + 0 + 7 + 0 + 9).

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

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8432 + ... + 8489.

It is an arithmetic number, because the mean of its divisors is an integer number (126915).

2⁴⁹⁰⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

490709 is a deficient number, since it is larger than the sum of its proper divisors (16951).

490709 is a wasteful number, since it uses less digits than its factorization.

490709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16950.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 490709 is about 700.5062455111. The cubic root of 490709 is about 78.8753575799.

The spelling of 490709 in words is "four hundred ninety thousand, seven hundred nine".