548309 has 2 divisors, whose sum is σ = 548310. Its totient is φ = 548308.

The previous prime is 548291. The next prime is 548323. The reversal of 548309 is 903845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485809 + 62500 = 697^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 548309 - 2¹⁶ = 482773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548399) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274154 + 274155.

It is an arithmetic number, because the mean of its divisors is an integer number (274155).

2⁵⁴⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

548309 is a deficient number, since it is larger than the sum of its proper divisors (1).

548309 is an equidigital number, since it uses as much as digits as its factorization.

548309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 548309 is about 740.4788990917. The cubic root of 548309 is about 81.8480728420.

The spelling of 548309 in words is "five hundred forty-eight thousand, three hundred nine".