655973 has 4 divisors (see below), whose sum is σ = 673740. Its totient is φ = 638208.

The previous prime is 655961. The next prime is 655987. The reversal of 655973 is 379556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 521284 + 134689 = 722^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 655973 - 2⁶ = 655909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655913) 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, 8828 + ... + 8901.

It is an arithmetic number, because the mean of its divisors is an integer number (168435).

2⁶⁵⁵⁹⁷³ is an apocalyptic number.

It is an amenable number.

655973 is a deficient number, since it is larger than the sum of its proper divisors (17767).

655973 is a wasteful number, since it uses less digits than its factorization.

655973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17766.

The product of its digits is 28350, while the sum is 35.

The square root of 655973 is about 809.9216011442. The cubic root of 655973 is about 86.8884376157. Note that the first 3 decimals are identical.

The spelling of 655973 in words is "six hundred fifty-five thousand, nine hundred seventy-three".