243204994 has 8 divisors (see below), whose sum is σ = 366823548. Its totient is φ = 120930480.

The previous prime is 243204961. The next prime is 243205019. The reversal of 243204994 is 499402342.

243204994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 239104369 + 4100625 = 15463^2 + 2025^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335557 + ... + 336280.

Almost surely, 2^243204994 is an apocalyptic number.

243204994 is a deficient number, since it is larger than the sum of its proper divisors (123618554).

243204994 is a wasteful number, since it uses less digits than its factorization.

243204994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672020.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 243204994 is about 15595.0310676189. The cubic root of 243204994 is about 624.2005727818.

The spelling of 243204994 in words is "two hundred forty-three million, two hundred four thousand, nine hundred ninety-four".