243947 has 8 divisors (see below), whose sum is σ = 270912. Its totient is φ = 217800.

The previous prime is 243931. The next prime is 243953. The reversal of 243947 is 749342.

243947 is nontrivially palindromic in base 6.

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

It is not a de Polignac number, because 243947 - 2⁴ = 243931 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 4² + 9³ + 3¹¹ + 4⁸ + 7 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (33864).

2²⁴³⁹⁴⁷ is an apocalyptic number.

243947 is a deficient number, since it is larger than the sum of its proper divisors (26965).

243947 is a wasteful number, since it uses less digits than its factorization.

243947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 6048, while the sum is 29.

The square root of 243947 is about 493.9099108137. The cubic root of 243947 is about 62.4834729634.

The spelling of 243947 in words is "two hundred forty-three thousand, nine hundred forty-seven".