684536 has 16 divisors (see below), whose sum is σ = 1315440. Its totient is φ = 333760.

The previous prime is 684527. The next prime is 684547. The reversal of 684536 is 635486.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 716 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (82215).

2⁶⁸⁴⁵³⁶ is an apocalyptic number.

It is an amenable number.

684536 is a deficient number, since it is larger than the sum of its proper divisors (630904).

684536 is a wasteful number, since it uses less digits than its factorization.

684536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134 (or 2130 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 684536 is about 827.3669077259. The cubic root of 684536 is about 88.1316898833.

The spelling of 684536 in words is "six hundred eighty-four thousand, five hundred thirty-six".