684473 has 2 divisors, whose sum is σ = 684474. Its totient is φ = 684472.

The previous prime is 684469. The next prime is 684493. The reversal of 684473 is 374486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 258064 = 653^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 684473 - 2² = 684469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684433) 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, 342236 + 342237.

It is an arithmetic number, because the mean of its divisors is an integer number (342237).

2⁶⁸⁴⁴⁷³ is an apocalyptic number.

It is an amenable number.

684473 is a deficient number, since it is larger than the sum of its proper divisors (1).

684473 is an equidigital number, since it uses as much as digits as its factorization.

684473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 684473 is about 827.3288342612. The cubic root of 684473 is about 88.1289861215.

The spelling of 684473 in words is "six hundred eighty-four thousand, four hundred seventy-three".