243047 has 4 divisors (see below), whose sum is σ = 277776. Its totient is φ = 208320.

The previous prime is 243031. The next prime is 243073. The reversal of 243047 is 740342.

It is a happy number.

243047 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243047 - 2⁴ = 243031 is a prime.

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 243047.

It is not an unprimeable number, because it can be changed into a prime (243077) 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, 17354 + ... + 17367.

It is an arithmetic number, because the mean of its divisors is an integer number (69444).

2²⁴³⁰⁴⁷ is an apocalyptic number.

243047 is a deficient number, since it is larger than the sum of its proper divisors (34729).

243047 is an equidigital number, since it uses as much as digits as its factorization.

243047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34728.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 243047 is about 492.9979715983. The cubic root of 243047 is about 62.4065376396.

Adding to 243047 its reverse (740342), we get a palindrome (983389).

The spelling of 243047 in words is "two hundred forty-three thousand, forty-seven", and thus it is an iban number.