263843 has 2 divisors, whose sum is σ = 263844. Its totient is φ = 263842.

The previous prime is 263827. The next prime is 263849. The reversal of 263843 is 348362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263843 - 2⁴ = 263827 is a prime.

It is a super-2 number, since 2×263843² = 139226257298, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263849) 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 as a sum of consecutive naturals, namely, 131921 + 131922.

It is an arithmetic number, because the mean of its divisors is an integer number (131922).

2²⁶³⁸⁴³ is an apocalyptic number.

263843 is a deficient number, since it is larger than the sum of its proper divisors (1).

263843 is an equidigital number, since it uses as much as digits as its factorization.

263843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 263843 is about 513.6565000075. The cubic root of 263843 is about 64.1379673386.

The spelling of 263843 in words is "two hundred sixty-three thousand, eight hundred forty-three".