684308 has 6 divisors (see below), whose sum is σ = 1197546. Its totient is φ = 342152.

The previous prime is 684293. The next prime is 684311. The reversal of 684308 is 803486.

It can be written as a sum of positive squares in only one way, i.e., 659344 + 24964 = 812^2 + 158^2 .

It is a congruent number.

It is an unprimeable number.

684308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85535 + ... + 85542.

It is an arithmetic number, because the mean of its divisors is an integer number (199591).

2⁶⁸⁴³⁰⁸ is an apocalyptic number.

It is an amenable number.

684308 is a deficient number, since it is larger than the sum of its proper divisors (513238).

684308 is a wasteful number, since it uses less digits than its factorization.

684308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171081 (or 171079 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 684308 is about 827.2291097393. The cubic root of 684308 is about 88.1219040543.

The spelling of 684308 in words is "six hundred eighty-four thousand, three hundred eight".