263489 has 2 divisors, whose sum is σ = 263490. Its totient is φ = 263488.

The previous prime is 263443. The next prime is 263491. The reversal of 263489 is 984362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255025 + 8464 = 505^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263489 is a prime.

Together with 263491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131744 + 131745.

It is an arithmetic number, because the mean of its divisors is an integer number (131745).

2²⁶³⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

263489 is a deficient number, since it is larger than the sum of its proper divisors (1).

263489 is an equidigital number, since it uses as much as digits as its factorization.

263489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 263489 is about 513.3117960850. The cubic root of 263489 is about 64.1092697136.

The spelling of 263489 in words is "two hundred sixty-three thousand, four hundred eighty-nine".