549687161 has 2 divisors, whose sum is σ = 549687162. Its totient is φ = 549687160.

The previous prime is 549687107. The next prime is 549687167. The reversal of 549687161 is 161786945.

549687161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386869561 + 162817600 = 19669^2 + 12760^2 .

It is a cyclic number.

It is not a de Polignac number, because 549687161 - 2¹⁴ = 549670777 is a prime.

It is not a weakly prime, because it can be changed into another prime (549687167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274843580 + 274843581.

It is an arithmetic number, because the mean of its divisors is an integer number (274843581).

Almost surely, 2^549687161 is an apocalyptic number.

It is an amenable number.

549687161 is a deficient number, since it is larger than the sum of its proper divisors (1).

549687161 is an equidigital number, since it uses as much as digits as its factorization.

549687161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 549687161 is about 23445.4081005215. The cubic root of 549687161 is about 819.1658983221.

The spelling of 549687161 in words is "five hundred forty-nine million, six hundred eighty-seven thousand, one hundred sixty-one".