684848317 has 2 divisors, whose sum is σ = 684848318. Its totient is φ = 684848316.

The previous prime is 684848309. The next prime is 684848323. The reversal of 684848317 is 713848486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563540121 + 121308196 = 23739^2 + 11014^2 .

It is a cyclic number.

It is not a de Polignac number, because 684848317 - 2³ = 684848309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684848347) 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, 342424158 + 342424159.

It is an arithmetic number, because the mean of its divisors is an integer number (342424159).

Almost surely, 2^684848317 is an apocalyptic number.

It is an amenable number.

684848317 is a deficient number, since it is larger than the sum of its proper divisors (1).

684848317 is an equidigital number, since it uses as much as digits as its factorization.

684848317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 49.

The square root of 684848317 is about 26169.6067414090. The cubic root of 684848317 is about 881.4509109715.

The spelling of 684848317 in words is "six hundred eighty-four million, eight hundred forty-eight thousand, three hundred seventeen".