653684 has 12 divisors (see below), whose sum is σ = 1211364. Its totient is φ = 307584.

The previous prime is 653659. The next prime is 653687. The reversal of 653684 is 486356.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 48400 = 778^2 + 220^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 653684.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653684.

It is not an unprimeable number, because it can be changed into a prime (653687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739 + ... + 4874.

It is an arithmetic number, because the mean of its divisors is an integer number (100947).

2⁶⁵³⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

653684 is a deficient number, since it is larger than the sum of its proper divisors (557680).

653684 is a wasteful number, since it uses less digits than its factorization.

653684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634 (or 9632 counting only the distinct ones).

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

The square root of 653684 is about 808.5072665103. The cubic root of 653684 is about 86.7872548836.

The spelling of 653684 in words is "six hundred fifty-three thousand, six hundred eighty-four".