549537009 has 24 divisors (see below), whose sum is σ = 858879648. Its totient is φ = 311613120.

The previous prime is 549536989. The next prime is 549537013. The reversal of 549537009 is 900735945.

It is not a de Polignac number, because 549537009 - 2¹¹ = 549534961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (599537009) 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 23 ways as a sum of consecutive naturals, for example, 4989 + ... + 33525.

It is an arithmetic number, because the mean of its divisors is an integer number (35786652).

Almost surely, 2^549537009 is an apocalyptic number.

It is an amenable number.

549537009 is a deficient number, since it is larger than the sum of its proper divisors (309342639).

549537009 is a wasteful number, since it uses less digits than its factorization.

549537009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28685 (or 28678 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 549537009 is about 23442.2057195990. The cubic root of 549537009 is about 819.0913040147.

The spelling of 549537009 in words is "five hundred forty-nine million, five hundred thirty-seven thousand, nine".