549569 has 2 divisors, whose sum is σ = 549570. Its totient is φ = 549568.

The previous prime is 549553. The next prime is 549587. The reversal of 549569 is 965945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543169 + 6400 = 737^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 549569 - 2⁴ = 549553 is a prime.

It is a super-2 number, since 2×549569² = 604052171522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549569.

It is not a weakly prime, because it can be changed into another prime (549509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274784 + 274785.

It is an arithmetic number, because the mean of its divisors is an integer number (274785).

2⁵⁴⁹⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

549569 is a deficient number, since it is larger than the sum of its proper divisors (1).

549569 is an equidigital number, since it uses as much as digits as its factorization.

549569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 549569 is about 741.3292116192. The cubic root of 549569 is about 81.9107198026.

The spelling of 549569 in words is "five hundred forty-nine thousand, five hundred sixty-nine".