243998 has 8 divisors (see below), whose sum is σ = 385320. Its totient is φ = 115560.

The previous prime is 243989. The next prime is 244003. The reversal of 243998 is 899342.

243998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243998.

It is an unprimeable number.

243998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 3173 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (48165).

2²⁴³⁹⁹⁸ is an apocalyptic number.

243998 is a deficient number, since it is larger than the sum of its proper divisors (141322).

243998 is a wasteful number, since it uses less digits than its factorization.

243998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442.

The product of its digits is 15552, while the sum is 35.

The square root of 243998 is about 493.9615369642. The cubic root of 243998 is about 62.4878269626.

The spelling of 243998 in words is "two hundred forty-three thousand, nine hundred ninety-eight".