655899 has 16 divisors (see below), whose sum is σ = 948480. Its totient is φ = 401760.

The previous prime is 655883. The next prime is 655901. The reversal of 655899 is 998556.

It is not a de Polignac number, because 655899 - 2⁴ = 655883 is a prime.

655899 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 655899.

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 655899.

It is not an unprimeable number, because it can be changed into a prime (655849) 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 15 ways as a sum of consecutive naturals, for example, 1954 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (59280).

2⁶⁵⁵⁸⁹⁹ is an apocalyptic number.

655899 is a deficient number, since it is larger than the sum of its proper divisors (292581).

655899 is a wasteful number, since it uses less digits than its factorization.

655899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its digits is 97200, while the sum is 42.

The square root of 655899 is about 809.8759164218. The cubic root of 655899 is about 86.8851702118.

The spelling of 655899 in words is "six hundred fifty-five thousand, eight hundred ninety-nine".