243799 has 2 divisors, whose sum is σ = 243800. Its totient is φ = 243798.

The previous prime is 243787. The next prime is 243809. The reversal of 243799 is 997342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243799 - 2⁷ = 243671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243709) 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, 121899 + 121900.

It is an arithmetic number, because the mean of its divisors is an integer number (121900).

2²⁴³⁷⁹⁹ is an apocalyptic number.

243799 is a deficient number, since it is larger than the sum of its proper divisors (1).

243799 is an equidigital number, since it uses as much as digits as its factorization.

243799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 243799 is about 493.7600631886. The cubic root of 243799 is about 62.4708343920.

The spelling of 243799 in words is "two hundred forty-three thousand, seven hundred ninety-nine".