548942409 has 6 divisors (see below), whose sum is σ = 792916826. Its totient is φ = 365961600.

The previous prime is 548942377. The next prime is 548942417. The reversal of 548942409 is 904249845.

It can be written as a sum of positive squares in only one way, i.e., 288830025 + 260112384 = 16995^2 + 16128^2 .

It is not a de Polignac number, because 548942409 - 2⁵ = 548942377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (548942489) by changing a digit.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30496792 + ... + 30496809.

Almost surely, 2^548942409 is an apocalyptic number.

It is an amenable number.

548942409 is a deficient number, since it is larger than the sum of its proper divisors (243974417).

548942409 is a wasteful number, since it uses less digits than its factorization.

548942409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60993607 (or 60993604 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 548942409 is about 23429.5200334962. The cubic root of 548942409 is about 818.7957779971.

The spelling of 548942409 in words is "five hundred forty-eight million, nine hundred forty-two thousand, four hundred nine".