655823 has 8 divisors (see below), whose sum is σ = 789120. Its totient is φ = 532440.

The previous prime is 655807. The next prime is 655847. The reversal of 655823 is 328556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655823 - 2⁴ = 655807 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 5 + 8⁶ + 5⁸ + 2¹⁰ + 3⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2333 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (98640).

2⁶⁵⁵⁸²³ is an apocalyptic number.

655823 is a deficient number, since it is larger than the sum of its proper divisors (133297).

655823 is a wasteful number, since it uses less digits than its factorization.

655823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957.

The product of its digits is 7200, while the sum is 29.

The square root of 655823 is about 809.8289942945. The cubic root of 655823 is about 86.8818142439.

The spelling of 655823 in words is "six hundred fifty-five thousand, eight hundred twenty-three".