305297 has 2 divisors, whose sum is σ = 305298. Its totient is φ = 305296.

The previous prime is 305281. The next prime is 305329. The reversal of 305297 is 792503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271441 + 33856 = 521^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 305297 - 2⁴ = 305281 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (305237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152648 + 152649.

It is an arithmetic number, because the mean of its divisors is an integer number (152649).

2³⁰⁵²⁹⁷ is an apocalyptic number.

It is an amenable number.

305297 is a deficient number, since it is larger than the sum of its proper divisors (1).

305297 is an equidigital number, since it uses as much as digits as its factorization.

305297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 305297 is about 552.5368765974. The cubic root of 305297 is about 67.3349970725.

The spelling of 305297 in words is "three hundred five thousand, two hundred ninety-seven".