490547009 has 2 divisors, whose sum is σ = 490547010. Its totient is φ = 490547008.

The previous prime is 490547003. The next prime is 490547027. The reversal of 490547009 is 900745094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362064784 + 128482225 = 19028^2 + 11335^2 .

It is a cyclic number.

It is not a de Polignac number, because 490547009 - 2²⁰ = 489498433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (490547003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245273504 + 245273505.

It is an arithmetic number, because the mean of its divisors is an integer number (245273505).

Almost surely, 2^490547009 is an apocalyptic number.

It is an amenable number.

490547009 is a deficient number, since it is larger than the sum of its proper divisors (1).

490547009 is an equidigital number, since it uses as much as digits as its factorization.

490547009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 490547009 is about 22148.2958486652. The cubic root of 490547009 is about 788.6667727967. Note that the first 3 decimals are identical.

The spelling of 490547009 in words is "four hundred ninety million, five hundred forty-seven thousand, nine".