684307 has 4 divisors (see below), whose sum is σ = 736960. Its totient is φ = 631656.

The previous prime is 684293. The next prime is 684311. The reversal of 684307 is 703486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 684307 - 2¹¹ = 682259 is a prime.

It is a super-3 number, since 3×684307³ = 961333778411647329, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684337) 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, 26307 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (184240).

2⁶⁸⁴³⁰⁷ is an apocalyptic number.

684307 is a deficient number, since it is larger than the sum of its proper divisors (52653).

684307 is a wasteful number, since it uses less digits than its factorization.

684307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52652.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 684307 is about 827.2285053116. The cubic root of 684307 is about 88.1218611293.

The spelling of 684307 in words is "six hundred eighty-four thousand, three hundred seven".