243947012 has 12 divisors (see below), whose sum is σ = 427148316. Its totient is φ = 121904640.

The previous prime is 243947009. The next prime is 243947027. The reversal of 243947012 is 210749342.

It can be written as a sum of positive squares in 2 ways, for example, as 82555396 + 161391616 = 9086^2 + 12704^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243947012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8789 + ... + 23772.

It is an arithmetic number, because the mean of its divisors is an integer number (35595693).

Almost surely, 2^243947012 is an apocalyptic number.

It is an amenable number.

243947012 is a deficient number, since it is larger than the sum of its proper divisors (183201304).

243947012 is a wasteful number, since it uses less digits than its factorization.

243947012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34438 (or 34436 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 243947012 is about 15618.8031551717. The cubic root of 243947012 is about 624.8347398797.

The spelling of 243947012 in words is "two hundred forty-three million, nine hundred forty-seven thousand, twelve".