490338209 has 4 divisors (see below), whose sum is σ = 490754580. Its totient is φ = 489921840.

The previous prime is 490338197. The next prime is 490338217. The reversal of 490338209 is 902833094.

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 464531809 + 25806400 = 21553^2 + 5080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490338209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490338269) 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, 206414 + ... + 208775.

It is an arithmetic number, because the mean of its divisors is an integer number (122688645).

Almost surely, 2^490338209 is an apocalyptic number.

It is an amenable number.

490338209 is a deficient number, since it is larger than the sum of its proper divisors (416371).

490338209 is a wasteful number, since it uses less digits than its factorization.

490338209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416370.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 490338209 is about 22143.5816660268. The cubic root of 490338209 is about 788.5548589610.

The spelling of 490338209 in words is "four hundred ninety million, three hundred thirty-eight thousand, two hundred nine".