243728873 has 2 divisors, whose sum is σ = 243728874. Its totient is φ = 243728872.

The previous prime is 243728867. The next prime is 243728897. The reversal of 243728873 is 378827342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194546704 + 49182169 = 13948^2 + 7013^2 .

It is a cyclic number.

It is not a de Polignac number, because 243728873 - 2⁶ = 243728809 is a prime.

It is not a weakly prime, because it can be changed into another prime (243728803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121864436 + 121864437.

It is an arithmetic number, because the mean of its divisors is an integer number (121864437).

Almost surely, 2^243728873 is an apocalyptic number.

It is an amenable number.

243728873 is a deficient number, since it is larger than the sum of its proper divisors (1).

243728873 is an equidigital number, since it uses as much as digits as its factorization.

243728873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 44.

The square root of 243728873 is about 15611.8183758331. The cubic root of 243728873 is about 624.6484405800.

The spelling of 243728873 in words is "two hundred forty-three million, seven hundred twenty-eight thousand, eight hundred seventy-three".