305530249 has 2 divisors, whose sum is σ = 305530250. Its totient is φ = 305530248.

The previous prime is 305530243. The next prime is 305530259. The reversal of 305530249 is 942035503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267486025 + 38044224 = 16355^2 + 6168^2 .

It is a cyclic number.

It is not a de Polignac number, because 305530249 - 2⁵ = 305530217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 305530249.

It is not a weakly prime, because it can be changed into another prime (305530243) 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, 152765124 + 152765125.

It is an arithmetic number, because the mean of its divisors is an integer number (152765125).

Almost surely, 2^305530249 is an apocalyptic number.

It is an amenable number.

305530249 is a deficient number, since it is larger than the sum of its proper divisors (1).

305530249 is an equidigital number, since it uses as much as digits as its factorization.

305530249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 305530249 is about 17479.4235888945. The cubic root of 305530249 is about 673.5214084027.

The spelling of 305530249 in words is "three hundred five million, five hundred thirty thousand, two hundred forty-nine".