549442509 has 16 divisors (see below), whose sum is σ = 913359360. Its totient is φ = 285424560.

The previous prime is 549442507. The next prime is 549442541. The reversal of 549442509 is 905244945.

It is not a de Polignac number, because 549442509 - 2¹ = 549442507 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549442501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189039 + ... + 1189500.

It is an arithmetic number, because the mean of its divisors is an integer number (57084960).

Almost surely, 2^549442509 is an apocalyptic number.

It is an amenable number.

549442509 is a deficient number, since it is larger than the sum of its proper divisors (363916851).

549442509 is a wasteful number, since it uses less digits than its factorization.

549442509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378560.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 549442509 is about 23440.1900376255. The cubic root of 549442509 is about 819.0443502068.

The spelling of 549442509 in words is "five hundred forty-nine million, four hundred forty-two thousand, five hundred nine".