243593 has 16 divisors (see below), whose sum is σ = 311040. Its totient is φ = 185856.

The previous prime is 243589. The next prime is 243613. The reversal of 243593 is 395342.

It is a cyclic number.

It is not a de Polignac number, because 243593 - 2² = 243589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243533) 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 in 15 ways as a sum of consecutive naturals, for example, 2693 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2²⁴³⁵⁹³ is an apocalyptic number.

243593 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

243593 is a deficient number, since it is larger than the sum of its proper divisors (67447).

243593 is a wasteful number, since it uses less digits than its factorization.

243593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136.

The product of its digits is 3240, while the sum is 26.

The square root of 243593 is about 493.5514157613. The cubic root of 243593 is about 62.4532343496.

The spelling of 243593 in words is "two hundred forty-three thousand, five hundred ninety-three".