490109 has 4 divisors (see below), whose sum is σ = 493116. Its totient is φ = 487104.

The previous prime is 490103. The next prime is 490111. The reversal of 490109 is 901094.

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 334084 + 156025 = 578^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 490109 - 2¹⁶ = 424573 is a prime.

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 (490103) 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, 1244 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (123279).

2⁴⁹⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

490109 is a deficient number, since it is larger than the sum of its proper divisors (3007).

490109 is a wasteful number, since it uses less digits than its factorization.

490109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 490109 is about 700.0778528135. The cubic root of 490109 is about 78.8431969605.

The spelling of 490109 in words is "four hundred ninety thousand, one hundred nine".