243939395 has 24 divisors (see below), whose sum is σ = 341573184. Its totient is φ = 166755456.

The previous prime is 243939391. The next prime is 243939419. The reversal of 243939395 is 593939342.

It is not a de Polignac number, because 243939395 - 2² = 243939391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243939391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88559 + ... + 91271.

It is an arithmetic number, because the mean of its divisors is an integer number (14232216).

Almost surely, 2^243939395 is an apocalyptic number.

243939395 is a deficient number, since it is larger than the sum of its proper divisors (97633789).

243939395 is a wasteful number, since it uses less digits than its factorization.

243939395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099 (or 3092 counting only the distinct ones).

The product of its digits is 787320, while the sum is 47.

The square root of 243939395 is about 15618.5593125615. The cubic root of 243939395 is about 624.8282365334.

The spelling of 243939395 in words is "two hundred forty-three million, nine hundred thirty-nine thousand, three hundred ninety-five".