549505009 has 2 divisors, whose sum is σ = 549505010. Its totient is φ = 549505008.

The previous prime is 549504973. The next prime is 549505087. The reversal of 549505009 is 900505945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306145009 + 243360000 = 17497^2 + 15600^2 .

It is a cyclic number.

It is not a de Polignac number, because 549505009 - 2⁹ = 549504497 is a prime.

It is not a weakly prime, because it can be changed into another prime (549575009) 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 as a sum of consecutive naturals, namely, 274752504 + 274752505.

It is an arithmetic number, because the mean of its divisors is an integer number (274752505).

Almost surely, 2^549505009 is an apocalyptic number.

It is an amenable number.

549505009 is a deficient number, since it is larger than the sum of its proper divisors (1).

549505009 is an equidigital number, since it uses as much as digits as its factorization.

549505009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 549505009 is about 23441.5231800325. The cubic root of 549505009 is about 819.0754049154.

The spelling of 549505009 in words is "five hundred forty-nine million, five hundred five thousand, nine".