659684 has 12 divisors (see below), whose sum is σ = 1168944. Its totient is φ = 325704.

The previous prime is 659671. The next prime is 659689. The reversal of 659684 is 486956.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (659689) by changing a digit.

659684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (97412).

2⁶⁵⁹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

659684 is a deficient number, since it is larger than the sum of its proper divisors (509260).

659684 is a wasteful number, since it uses less digits than its factorization.

659684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 2072 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 659684 is about 812.2093326231. The cubic root of 659684 is about 87.0519793313.

The spelling of 659684 in words is "six hundred fifty-nine thousand, six hundred eighty-four".