263869 has 2 divisors, whose sum is σ = 263870. Its totient is φ = 263868.

The previous prime is 263867. The next prime is 263881. The reversal of 263869 is 968362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 72900 = 437^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 263869 - 2¹ = 263867 is a prime.

It is a super-2 number, since 2×263869² = 139253698322, which contains 22 as substring.

Together with 263867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131934 + 131935.

It is an arithmetic number, because the mean of its divisors is an integer number (131935).

2²⁶³⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

263869 is a deficient number, since it is larger than the sum of its proper divisors (1).

263869 is an equidigital number, since it uses as much as digits as its factorization.

263869 is an odious number, because the sum of its binary digits is odd.

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

The square root of 263869 is about 513.6818081264. The cubic root of 263869 is about 64.1400740616.

The spelling of 263869 in words is "two hundred sixty-three thousand, eight hundred sixty-nine".