263289 has 16 divisors (see below), whose sum is σ = 389312. Its totient is φ = 157248.

The previous prime is 263287. The next prime is 263293. The reversal of 263289 is 982362.

It is not a de Polignac number, because 263289 - 2¹ = 263287 is a prime.

It is a Duffinian number.

Its product of digits (5184) is a multiple of the sum of its prime divisors (216).

263289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (263287) 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, 1599 + ... + 1755.

It is an arithmetic number, because the mean of its divisors is an integer number (24332).

2²⁶³²⁸⁹ is an apocalyptic number.

It is an amenable number.

263289 is a deficient number, since it is larger than the sum of its proper divisors (126023).

263289 is a wasteful number, since it uses less digits than its factorization.

263289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its digits is 5184, while the sum is 30.

The square root of 263289 is about 513.1169457346. The cubic root of 263289 is about 64.0930450015.

The spelling of 263289 in words is "two hundred sixty-three thousand, two hundred eighty-nine".