243147866 has 8 divisors (see below), whose sum is σ = 392777364. Its totient is φ = 112222080.

The previous prime is 243147851. The next prime is 243147869. The reversal of 243147866 is 668741342.

It can be written as a sum of positive squares in 2 ways, for example, as 225750625 + 17397241 = 15025^2 + 4171^2 .

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

It is not an unprimeable number, because it can be changed into a prime (243147869) 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, 4675895 + ... + 4675946.

Almost surely, 2^243147866 is an apocalyptic number.

243147866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243147866 is a deficient number, since it is larger than the sum of its proper divisors (149629498).

243147866 is a wasteful number, since it uses less digits than its factorization.

243147866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9351856.

The product of its digits is 193536, while the sum is 41.

The square root of 243147866 is about 15593.1993509991. The cubic root of 243147866 is about 624.1516947795.

The spelling of 243147866 in words is "two hundred forty-three million, one hundred forty-seven thousand, eight hundred sixty-six".