306682393 has 2 divisors, whose sum is σ = 306682394. Its totient is φ = 306682392.

The previous prime is 306682367. The next prime is 306682421. The reversal of 306682393 is 393286603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243765769 + 62916624 = 15613^2 + 7932^2 .

It is a cyclic number.

It is not a de Polignac number, because 306682393 - 2⁵ = 306682361 is a prime.

It is not a weakly prime, because it can be changed into another prime (306682303) 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, 153341196 + 153341197.

It is an arithmetic number, because the mean of its divisors is an integer number (153341197).

Almost surely, 2^306682393 is an apocalyptic number.

It is an amenable number.

306682393 is a deficient number, since it is larger than the sum of its proper divisors (1).

306682393 is an equidigital number, since it uses as much as digits as its factorization.

306682393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 306682393 is about 17512.3497281204. The cubic root of 306682393 is about 674.3669550934.

The spelling of 306682393 in words is "three hundred six million, six hundred eighty-two thousand, three hundred ninety-three".