545552009 has 2 divisors, whose sum is σ = 545552010. Its totient is φ = 545552008.

The previous prime is 545551991. The next prime is 545552023. The reversal of 545552009 is 900255545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518563984 + 26988025 = 22772^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 545552009 - 2⁸ = 545551753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545552009.

It is not a weakly prime, because it can be changed into another prime (545552039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272776004 + 272776005.

It is an arithmetic number, because the mean of its divisors is an integer number (272776005).

Almost surely, 2^545552009 is an apocalyptic number.

It is an amenable number.

545552009 is a deficient number, since it is larger than the sum of its proper divisors (1).

545552009 is an equidigital number, since it uses as much as digits as its factorization.

545552009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 545552009 is about 23357.0548014941. The cubic root of 545552009 is about 817.1066025784.

The spelling of 545552009 in words is "five hundred forty-five million, five hundred fifty-two thousand, nine".