684575 has 12 divisors (see below), whose sum is σ = 859320. Its totient is φ = 540960.

The previous prime is 684569. The next prime is 684581. The reversal of 684575 is 575486.

It is an interprime number because it is at equal distance from previous prime (684569) and next prime (684581).

It is not a de Polignac number, because 684575 - 2⁴ = 684559 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 3377 + ... + 3573.

It is an arithmetic number, because the mean of its divisors is an integer number (71610).

2⁶⁸⁴⁵⁷⁵ is an apocalyptic number.

684575 is a deficient number, since it is larger than the sum of its proper divisors (174745).

684575 is a wasteful number, since it uses less digits than its factorization.

684575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 341 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 684575 is about 827.3904761357. The cubic root of 684575 is about 88.1333635574.

The spelling of 684575 in words is "six hundred eighty-four thousand, five hundred seventy-five".