655636 has 6 divisors (see below), whose sum is σ = 1147370. Its totient is φ = 327816.

The previous prime is 655601. The next prime is 655637. The reversal of 655636 is 636556.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 571536 + 84100 = 756^2 + 290^2 .

It is a junction number, because it is equal to n+sod(n) for n = 655598 and 655607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655637) by changing a digit.

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 as a sum of consecutive naturals, namely, 81951 + ... + 81958.

2⁶⁵⁵⁶³⁶ is an apocalyptic number.

It is an amenable number.

655636 is a deficient number, since it is larger than the sum of its proper divisors (491734).

655636 is a wasteful number, since it uses less digits than its factorization.

655636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163913 (or 163911 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 655636 is about 809.7135295893. The cubic root of 655636 is about 86.8735556926.

The spelling of 655636 in words is "six hundred fifty-five thousand, six hundred thirty-six".