305666149 has 2 divisors, whose sum is σ = 305666150. Its totient is φ = 305666148.

The previous prime is 305666093. The next prime is 305666161. The reversal of 305666149 is 941666503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281232900 + 24433249 = 16770^2 + 4943^2 .

It is a cyclic number.

It is not a de Polignac number, because 305666149 - 2¹¹ = 305664101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305660149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152833074 + 152833075.

It is an arithmetic number, because the mean of its divisors is an integer number (152833075).

Almost surely, 2^305666149 is an apocalyptic number.

It is an amenable number.

305666149 is a deficient number, since it is larger than the sum of its proper divisors (1).

305666149 is an equidigital number, since it uses as much as digits as its factorization.

305666149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 305666149 is about 17483.3105846690. The cubic root of 305666149 is about 673.6212544812.

The spelling of 305666149 in words is "three hundred five million, six hundred sixty-six thousand, one hundred forty-nine".