684545713 has 2 divisors, whose sum is σ = 684545714. Its totient is φ = 684545712.

The previous prime is 684545707. The next prime is 684545731. The reversal of 684545713 is 317545486.

684545713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (684545731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534164544 + 150381169 = 23112^2 + 12263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684545713 is a prime.

It is equal to p_35493289 and since 684545713 and 35493289 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684545713.

It is not a weakly prime, because it can be changed into another prime (684545753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342272856 + 342272857.

It is an arithmetic number, because the mean of its divisors is an integer number (342272857).

Almost surely, 2^684545713 is an apocalyptic number.

It is an amenable number.

684545713 is a deficient number, since it is larger than the sum of its proper divisors (1).

684545713 is an equidigital number, since it uses as much as digits as its factorization.

684545713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 684545713 is about 26163.8245101896. The cubic root of 684545713 is about 881.3210671993.

The spelling of 684545713 in words is "six hundred eighty-four million, five hundred forty-five thousand, seven hundred thirteen".