305240519989 has 2 divisors, whose sum is σ = 305240519990. Its totient is φ = 305240519988.

The previous prime is 305240519953. The next prime is 305240520007. The reversal of 305240519989 is 989915042503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264779197489 + 40461322500 = 514567^2 + 201150^2 .

It is a cyclic number.

It is not a de Polignac number, because 305240519989 - 2⁹ = 305240519477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305240519189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152620259994 + 152620259995.

It is an arithmetic number, because the mean of its divisors is an integer number (152620259995).

Almost surely, 2^305240519989 is an apocalyptic number.

It is an amenable number.

305240519989 is a deficient number, since it is larger than the sum of its proper divisors (1).

305240519989 is an equidigital number, since it uses as much as digits as its factorization.

305240519989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 305240519989 in words is "three hundred five billion, two hundred forty million, five hundred nineteen thousand, nine hundred eighty-nine".