243439 has 8 divisors (see below), whose sum is σ = 282240. Its totient is φ = 205656.

The previous prime is 243437. The next prime is 243461. The reversal of 243439 is 934342.

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

It is a cyclic number.

It is not a de Polignac number, because 243439 - 2¹ = 243437 is a prime.

It is a super-3 number, since 3×243439³ = 43280445333640557, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2 + 4² + 4⁸ + 3⁶ + 3¹¹ + 9 .

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431) 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, 372 + ... + 790.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2²⁴³⁴³⁹ is an apocalyptic number.

243439 is a deficient number, since it is larger than the sum of its proper divisors (38801).

243439 is an equidigital number, since it uses as much as digits as its factorization.

243439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its digits is 2592, while the sum is 25.

The square root of 243439 is about 493.3953789812. The cubic root of 243439 is about 62.4400705538.

The spelling of 243439 in words is "two hundred forty-three thousand, four hundred thirty-nine".