243863 has 2 divisors, whose sum is σ = 243864. Its totient is φ = 243862.
The previous prime is 243857. The next prime is 243871. The reversal of 243863 is 368342.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 243863 - 26 = 243799 is a prime.
It is a Sophie Germain prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (243263) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121931 + 121932.
It is an arithmetic number, because the mean of its divisors is an integer number (121932).
2243863 is an apocalyptic number.
243863 is a deficient number, since it is larger than the sum of its proper divisors (1).
243863 is an equidigital number, since it uses as much as digits as its factorization.
243863 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 243863 is about 493.8248677416. The cubic root of 243863 is about 62.4763003477.
It can be divided in two parts, 24386 and 3, that added together give a cube (24389 = 293).
The spelling of 243863 in words is "two hundred forty-three thousand, eight hundred sixty-three".
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