243879945 has 32 divisors (see below), whose sum is σ = 411402240. Its totient is φ = 123184320.

The previous prime is 243879929. The next prime is 243879967. The reversal of 243879945 is 549978342.

It is not a de Polignac number, because 243879945 - 2⁴ = 243879929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16276 + ... + 27434.

It is an arithmetic number, because the mean of its divisors is an integer number (12856320).

Almost surely, 2^243879945 is an apocalyptic number.

It is an amenable number.

243879945 is a deficient number, since it is larger than the sum of its proper divisors (167522295).

243879945 is a wasteful number, since it uses less digits than its factorization.

243879945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245.

The product of its digits is 2177280, while the sum is 51.

The square root of 243879945 is about 15616.6560120917. The cubic root of 243879945 is about 624.7774738474. Note that the first 3 decimals are identical.

The spelling of 243879945 in words is "two hundred forty-three million, eight hundred seventy-nine thousand, nine hundred forty-five".