243242339 has 4 divisors (see below), whose sum is σ = 244502856. Its totient is φ = 241981824.

The previous prime is 243242327. The next prime is 243242359. The reversal of 243242339 is 933242342.

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

It is a cyclic number.

It is not a de Polignac number, because 243242339 - 2⁴ = 243242323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243242359) 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, 629969 + ... + 630354.

It is an arithmetic number, because the mean of its divisors is an integer number (61125714).

Almost surely, 2^243242339 is an apocalyptic number.

243242339 is a deficient number, since it is larger than the sum of its proper divisors (1260517).

243242339 is a wasteful number, since it uses less digits than its factorization.

243242339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260516.

The product of its digits is 31104, while the sum is 32.

The square root of 243242339 is about 15596.2283581640. The cubic root of 243242339 is about 624.2325205596.

The spelling of 243242339 in words is "two hundred forty-three million, two hundred forty-two thousand, three hundred thirty-nine".