655684 has 12 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 313544.

The previous prime is 655657. The next prime is 655687. The reversal of 655684 is 486556.

It is not an unprimeable number, because it can be changed into a prime (655687) by changing a digit.

655684 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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472 + ... + 3655.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2⁶⁵⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

655684 is a deficient number, since it is larger than the sum of its proper divisors (541820).

655684 is a wasteful number, since it uses less digits than its factorization.

655684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154 (or 7152 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 655684 is about 809.7431691592. The cubic root of 655684 is about 86.8756756844.

The spelling of 655684 in words is "six hundred fifty-five thousand, six hundred eighty-four".