655783 has 4 divisors (see below), whose sum is σ = 663768. Its totient is φ = 647800.

The previous prime is 655757. The next prime is 655807. The reversal of 655783 is 387556.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655783 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 (655723) 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, 3868 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (165942).

2⁶⁵⁵⁷⁸³ is an apocalyptic number.

655783 is a deficient number, since it is larger than the sum of its proper divisors (7985).

655783 is an equidigital number, since it uses as much as digits as its factorization.

655783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7984.

The product of its digits is 25200, while the sum is 34.

The square root of 655783 is about 809.8042973460. The cubic root of 655783 is about 86.8800478408.

The spelling of 655783 in words is "six hundred fifty-five thousand, seven hundred eighty-three".