305775149 has 2 divisors, whose sum is σ = 305775150. Its totient is φ = 305775148.

The previous prime is 305775083. The next prime is 305775157. The reversal of 305775149 is 941577503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272019049 + 33756100 = 16493^2 + 5810^2 .

It is an emirp because it is prime and its reverse (941577503) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305775149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305775199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152887574 + 152887575.

It is an arithmetic number, because the mean of its divisors is an integer number (152887575).

Almost surely, 2^305775149 is an apocalyptic number.

It is an amenable number.

305775149 is a deficient number, since it is larger than the sum of its proper divisors (1).

305775149 is an equidigital number, since it uses as much as digits as its factorization.

305775149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 305775149 is about 17486.4275654005. The cubic root of 305775149 is about 673.7013156754.

The spelling of 305775149 in words is "three hundred five million, seven hundred seventy-five thousand, one hundred forty-nine".