549161 has 2 divisors, whose sum is σ = 549162. Its totient is φ = 549160.

The previous prime is 549149. The next prime is 549163. The reversal of 549161 is 161945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337561 + 211600 = 581^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 549161 - 2⁶ = 549097 is a prime.

Together with 549163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549161.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549161.

It is not a weakly prime, because it can be changed into another prime (549163) 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, 274580 + 274581.

It is an arithmetic number, because the mean of its divisors is an integer number (274581).

2⁵⁴⁹¹⁶¹ is an apocalyptic number.

It is an amenable number.

549161 is a deficient number, since it is larger than the sum of its proper divisors (1).

549161 is an equidigital number, since it uses as much as digits as its factorization.

549161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 549161 is about 741.0539791405. The cubic root of 549161 is about 81.8904446128.

The spelling of 549161 in words is "five hundred forty-nine thousand, one hundred sixty-one".