305120317 has 2 divisors, whose sum is σ = 305120318. Its totient is φ = 305120316.

The previous prime is 305120177. The next prime is 305120327. The reversal of 305120317 is 713021503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284563161 + 20557156 = 16869^2 + 4534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305120317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305120327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152560158 + 152560159.

It is an arithmetic number, because the mean of its divisors is an integer number (152560159).

Almost surely, 2^305120317 is an apocalyptic number.

It is an amenable number.

305120317 is a deficient number, since it is larger than the sum of its proper divisors (1).

305120317 is an equidigital number, since it uses as much as digits as its factorization.

305120317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 305120317 is about 17467.6935226148. The cubic root of 305120317 is about 673.2200508428.

The spelling of 305120317 in words is "three hundred five million, one hundred twenty thousand, three hundred seventeen".