684323 has 4 divisors (see below), whose sum is σ = 720360. Its totient is φ = 648288.

The previous prime is 684311. The next prime is 684329. The reversal of 684323 is 323486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323486 = 2 ⋅161743.

It is a cyclic number.

It is not a de Polignac number, because 684323 - 2¹⁰ = 683299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684292 and 684301.

It is not an unprimeable number, because it can be changed into a prime (684329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17990 + ... + 18027.

It is an arithmetic number, because the mean of its divisors is an integer number (180090).

2⁶⁸⁴³²³ is an apocalyptic number.

684323 is a deficient number, since it is larger than the sum of its proper divisors (36037).

684323 is a wasteful number, since it uses less digits than its factorization.

684323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36036.

The product of its digits is 3456, while the sum is 26.

The square root of 684323 is about 827.2381761017. The cubic root of 684323 is about 88.1225479257.

The spelling of 684323 in words is "six hundred eighty-four thousand, three hundred twenty-three".