243097873 has 2 divisors, whose sum is σ = 243097874. Its totient is φ = 243097872.

The previous prime is 243097861. The next prime is 243097903. The reversal of 243097873 is 378790342.

243097873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196476289 + 46621584 = 14017^2 + 6828^2 .

It is a cyclic number.

It is not a de Polignac number, because 243097873 - 2²⁵ = 209543441 is a prime.

It is not a weakly prime, because it can be changed into another prime (243097973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121548936 + 121548937.

It is an arithmetic number, because the mean of its divisors is an integer number (121548937).

Almost surely, 2^243097873 is an apocalyptic number.

It is an amenable number.

243097873 is a deficient number, since it is larger than the sum of its proper divisors (1).

243097873 is an equidigital number, since it uses as much as digits as its factorization.

243097873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 243097873 is about 15591.5962300208. The cubic root of 243097873 is about 624.1089151121.

The spelling of 243097873 in words is "two hundred forty-three million, ninety-seven thousand, eight hundred seventy-three".