243093 has 4 divisors (see below), whose sum is σ = 324128. Its totient is φ = 162060.

The previous prime is 243091. The next prime is 243101. The reversal of 243093 is 390342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243093 - 2¹ = 243091 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243091) 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 3 ways as a sum of consecutive naturals, for example, 40513 + ... + 40518.

It is an arithmetic number, because the mean of its divisors is an integer number (81032).

2²⁴³⁰⁹³ is an apocalyptic number.

It is an amenable number.

243093 is a deficient number, since it is larger than the sum of its proper divisors (81035).

243093 is an equidigital number, since it uses as much as digits as its factorization.

243093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81034.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 243093 is about 493.0446227270. The cubic root of 243093 is about 62.4104744908.

It can be divided in two parts, 24309 and 3, that multiplied together give a palindrome (72927).

The spelling of 243093 in words is "two hundred forty-three thousand, ninety-three".