684269317 has 2 divisors, whose sum is σ = 684269318. Its totient is φ = 684269316.

The previous prime is 684269281. The next prime is 684269321. The reversal of 684269317 is 713962486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637360516 + 46908801 = 25246^2 + 6849^2 .

It is a cyclic number.

It is not a de Polignac number, because 684269317 - 2¹⁵ = 684236549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684269357) 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, 342134658 + 342134659.

It is an arithmetic number, because the mean of its divisors is an integer number (342134659).

Almost surely, 2^684269317 is an apocalyptic number.

It is an amenable number.

684269317 is a deficient number, since it is larger than the sum of its proper divisors (1).

684269317 is an equidigital number, since it uses as much as digits as its factorization.

684269317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 684269317 is about 26158.5419509574. The cubic root of 684269317 is about 881.2024355261.

The spelling of 684269317 in words is "six hundred eighty-four million, two hundred sixty-nine thousand, three hundred seventeen".