243293 has 4 divisors (see below), whose sum is σ = 244608. Its totient is φ = 241980.

The previous prime is 243263. The next prime is 243301. The reversal of 243293 is 392342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 392342 = 2 ⋅196171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243293 is a prime.

It is a d-powerful number, because it can be written as 2³ + 4⁸ + 2⁹ + 3⁴ + 9 + 3¹¹ .

It is a Duffinian 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 243293.

It is not an unprimeable number, because it can be changed into a prime (243203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2²⁴³²⁹³ is an apocalyptic number.

It is an amenable number.

243293 is a deficient number, since it is larger than the sum of its proper divisors (1315).

243293 is a wasteful number, since it uses less digits than its factorization.

243293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its digits is 1296, while the sum is 23.

The square root of 243293 is about 493.2474024260. The cubic root of 243293 is about 62.4275854639.

The spelling of 243293 in words is "two hundred forty-three thousand, two hundred ninety-three".