289663 has 8 divisors (see below), whose sum is σ = 334800. Its totient is φ = 247680.

The previous prime is 289657. The next prime is 289669. The reversal of 289663 is 366982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (289657) and next prime (289669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289663 - 2⁹ = 289151 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 (289669) 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 7 ways as a sum of consecutive naturals, for example, 588 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2²⁸⁹⁶⁶³ is an apocalyptic number.

289663 is a deficient number, since it is larger than the sum of its proper divisors (45137).

289663 is a wasteful number, since it uses less digits than its factorization.

289663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577.

The product of its digits is 15552, while the sum is 34.

The square root of 289663 is about 538.2034931139. The cubic root of 289663 is about 66.1654100169.

The spelling of 289663 in words is "two hundred eighty-nine thousand, six hundred sixty-three".