548879909 has 2 divisors, whose sum is σ = 548879910. Its totient is φ = 548879908.

The previous prime is 548879887. The next prime is 548879939. The reversal of 548879909 is 909978845.

548879909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533841025 + 15038884 = 23105^2 + 3878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-548879909 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 (548879939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274439954 + 274439955.

It is an arithmetic number, because the mean of its divisors is an integer number (274439955).

Almost surely, 2^548879909 is an apocalyptic number.

It is an amenable number.

548879909 is a deficient number, since it is larger than the sum of its proper divisors (1).

548879909 is an equidigital number, since it uses as much as digits as its factorization.

548879909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 548879909 is about 23428.1862080700. The cubic root of 548879909 is about 818.7647020727.

The spelling of 548879909 in words is "five hundred forty-eight million, eight hundred seventy-nine thousand, nine hundred nine".