549347809 has 8 divisors (see below), whose sum is σ = 592638120. Its totient is φ = 507277056.

The previous prime is 549347767. The next prime is 549347819. The reversal of 549347809 is 908743945.

It can be written as a sum of positive squares in 4 ways, for example, as 51165409 + 498182400 = 7153^2 + 22320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549347809 - 2⁷ = 549347681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549347819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303954 + ... + 305755.

It is an arithmetic number, because the mean of its divisors is an integer number (74079765).

Almost surely, 2^549347809 is an apocalyptic number.

It is an amenable number.

549347809 is a deficient number, since it is larger than the sum of its proper divisors (43290311).

549347809 is a wasteful number, since it uses less digits than its factorization.

549347809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609779.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 549347809 is about 23438.1699157592. The cubic root of 549347809 is about 818.9972916245.

The spelling of 549347809 in words is "five hundred forty-nine million, three hundred forty-seven thousand, eight hundred nine".