263399 has 2 divisors, whose sum is σ = 263400. Its totient is φ = 263398.

The previous prime is 263387. The next prime is 263401. The reversal of 263399 is 993362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263399 - 2⁴ = 263383 is a prime.

Together with 263401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131699 + 131700.

It is an arithmetic number, because the mean of its divisors is an integer number (131700).

2²⁶³³⁹⁹ is an apocalyptic number.

263399 is a deficient number, since it is larger than the sum of its proper divisors (1).

263399 is an equidigital number, since it uses as much as digits as its factorization.

263399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The square root of 263399 is about 513.2241225819. The cubic root of 263399 is about 64.1019696095.

The spelling of 263399 in words is "two hundred sixty-three thousand, three hundred ninety-nine".