655923 has 4 divisors (see below), whose sum is σ = 874568. Its totient is φ = 437280.

The previous prime is 655913. The next prime is 655927. The reversal of 655923 is 329556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 655923 - 2⁶ = 655859 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655923.

It is not an unprimeable number, because it can be changed into a prime (655927) by changing a digit.

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, 109318 + ... + 109323.

It is an arithmetic number, because the mean of its divisors is an integer number (218642).

2⁶⁵⁵⁹²³ is an apocalyptic number.

655923 is a deficient number, since it is larger than the sum of its proper divisors (218645).

655923 is a wasteful number, since it uses less digits than its factorization.

655923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218644.

The product of its digits is 8100, while the sum is 30.

The square root of 655923 is about 809.8907333709. The cubic root of 655923 is about 86.8862299373.

The spelling of 655923 in words is "six hundred fifty-five thousand, nine hundred twenty-three".