548909 has 2 divisors, whose sum is σ = 548910. Its totient is φ = 548908.

The previous prime is 548903. The next prime is 548927. The reversal of 548909 is 909845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 122500 = 653^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 548909 - 2⁴ = 548893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274454 + 274455.

It is an arithmetic number, because the mean of its divisors is an integer number (274455).

2⁵⁴⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

548909 is a deficient number, since it is larger than the sum of its proper divisors (1).

548909 is an equidigital number, since it uses as much as digits as its factorization.

548909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 548909 is about 740.8839315304. The cubic root of 548909 is about 81.8779166842.

The spelling of 548909 in words is "five hundred forty-eight thousand, nine hundred nine".