545585309 has 2 divisors, whose sum is σ = 545585310. Its totient is φ = 545585308.

The previous prime is 545585303. The next prime is 545585317. The reversal of 545585309 is 903585545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493817284 + 51768025 = 22222^2 + 7195^2 .

It is a cyclic number.

It is not a de Polignac number, because 545585309 - 2¹² = 545581213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545585309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545585303) 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, 272792654 + 272792655.

It is an arithmetic number, because the mean of its divisors is an integer number (272792655).

Almost surely, 2^545585309 is an apocalyptic number.

It is an amenable number.

545585309 is a deficient number, since it is larger than the sum of its proper divisors (1).

545585309 is an equidigital number, since it uses as much as digits as its factorization.

545585309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 44.

The square root of 545585309 is about 23357.7676373407. The cubic root of 545585309 is about 817.1232273889.

The spelling of 545585309 in words is "five hundred forty-five million, five hundred eighty-five thousand, three hundred nine".