548340409 has 2 divisors, whose sum is σ = 548340410. Its totient is φ = 548340408.

The previous prime is 548340383. The next prime is 548340421. The reversal of 548340409 is 904043845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547700409 + 640000 = 23403^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 548340409 - 2¹¹ = 548338361 is a prime.

It is not a weakly prime, because it can be changed into another prime (548340479) 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, 274170204 + 274170205.

It is an arithmetic number, because the mean of its divisors is an integer number (274170205).

Almost surely, 2^548340409 is an apocalyptic number.

It is an amenable number.

548340409 is a deficient number, since it is larger than the sum of its proper divisors (1).

548340409 is an equidigital number, since it uses as much as digits as its factorization.

548340409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 548340409 is about 23416.6694685645. The cubic root of 548340409 is about 818.4963565727.

The spelling of 548340409 in words is "five hundred forty-eight million, three hundred forty thousand, four hundred nine".