549082009 has 4 divisors (see below), whose sum is σ = 627522304. Its totient is φ = 470641716.

The previous prime is 549081991. The next prime is 549082019. The reversal of 549082009 is 900280945.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900280945 = 5 ⋅180056189.

It is a cyclic number.

It is not a de Polignac number, because 549082009 - 2¹⁷ = 548950937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549082019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39220137 + ... + 39220150.

It is an arithmetic number, because the mean of its divisors is an integer number (156880576).

Almost surely, 2^549082009 is an apocalyptic number.

It is an amenable number.

549082009 is a deficient number, since it is larger than the sum of its proper divisors (78440295).

549082009 is an equidigital number, since it uses as much as digits as its factorization.

549082009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78440294.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 549082009 is about 23432.4989917849. The cubic root of 549082009 is about 818.8651806646.

The spelling of 549082009 in words is "five hundred forty-nine million, eighty-two thousand, nine".