684773 has 2 divisors, whose sum is σ = 684774. Its totient is φ = 684772.

The previous prime is 684769. The next prime is 684791. The reversal of 684773 is 377486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407044 + 277729 = 638^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 684773 - 2² = 684769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342386 + 342387.

It is an arithmetic number, because the mean of its divisors is an integer number (342387).

2⁶⁸⁴⁷⁷³ is an apocalyptic number.

It is an amenable number.

684773 is a deficient number, since it is larger than the sum of its proper divisors (1).

684773 is an equidigital number, since it uses as much as digits as its factorization.

684773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 684773 is about 827.5101207840. The cubic root of 684773 is about 88.1418596920.

The spelling of 684773 in words is "six hundred eighty-four thousand, seven hundred seventy-three".