259663 has 4 divisors (see below), whose sum is σ = 262288. Its totient is φ = 257040.

The previous prime is 259657. The next prime is 259667. The reversal of 259663 is 366952.

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

It is a cyclic number.

It is not a de Polignac number, because 259663 - 2⁵ = 259631 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 (259667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (65572).

2²⁵⁹⁶⁶³ is an apocalyptic number.

259663 is a deficient number, since it is larger than the sum of its proper divisors (2625).

259663 is a wasteful number, since it uses less digits than its factorization.

259663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624.

The product of its digits is 9720, while the sum is 31.

The square root of 259663 is about 509.5713885218. The cubic root of 259663 is about 63.7974553742.

The spelling of 259663 in words is "two hundred fifty-nine thousand, six hundred sixty-three".