549092161 has 2 divisors, whose sum is σ = 549092162. Its totient is φ = 549092160.

The previous prime is 549092149. The next prime is 549092207. The reversal of 549092161 is 161290945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307476225 + 241615936 = 17535^2 + 15544^2 .

It is a cyclic number.

It is not a de Polignac number, because 549092161 - 2⁹ = 549091649 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 549092161.

It is not a weakly prime, because it can be changed into another prime (549092101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274546080 + 274546081.

It is an arithmetic number, because the mean of its divisors is an integer number (274546081).

Almost surely, 2^549092161 is an apocalyptic number.

It is an amenable number.

549092161 is a deficient number, since it is larger than the sum of its proper divisors (1).

549092161 is an equidigital number, since it uses as much as digits as its factorization.

549092161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 549092161 is about 23432.7156130057. The cubic root of 549092161 is about 818.8702273110.

The spelling of 549092161 in words is "five hundred forty-nine million, ninety-two thousand, one hundred sixty-one".