655887 has 4 divisors (see below), whose sum is σ = 874520. Its totient is φ = 437256.

The previous prime is 655883. The next prime is 655901. The reversal of 655887 is 788556.

It is a happy number.

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

It is not a de Polignac number, because 655887 - 2² = 655883 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655887.

It is not an unprimeable number, because it can be changed into a prime (655883) 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, 109312 + ... + 109317.

It is an arithmetic number, because the mean of its divisors is an integer number (218630).

2⁶⁵⁵⁸⁸⁷ is an apocalyptic number.

655887 is a deficient number, since it is larger than the sum of its proper divisors (218633).

655887 is a wasteful number, since it uses less digits than its factorization.

655887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218632.

The product of its digits is 67200, while the sum is 39.

The square root of 655887 is about 809.8685078456. The cubic root of 655887 is about 86.8846403394.

The spelling of 655887 in words is "six hundred fifty-five thousand, eight hundred eighty-seven".