548909161 has 2 divisors, whose sum is σ = 548909162. Its totient is φ = 548909160.

The previous prime is 548909087. The next prime is 548909173. The reversal of 548909161 is 161909845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547794025 + 1115136 = 23405^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 548909161 - 2¹³ = 548900969 is a prime.

It is equal to p_28791079 and since 548909161 and 28791079 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (548909261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274454580 + 274454581.

It is an arithmetic number, because the mean of its divisors is an integer number (274454581).

Almost surely, 2^548909161 is an apocalyptic number.

It is an amenable number.

548909161 is a deficient number, since it is larger than the sum of its proper divisors (1).

548909161 is an equidigital number, since it uses as much as digits as its factorization.

548909161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 548909161 is about 23428.8104905051. The cubic root of 548909161 is about 818.7792468934.

The spelling of 548909161 in words is "five hundred forty-eight million, nine hundred nine thousand, one hundred sixty-one".