243097761 has 12 divisors (see below), whose sum is σ = 342089232. Its totient is φ = 153534744.

The previous prime is 243097727. The next prime is 243097763. The reversal of 243097761 is 167790342.

243097761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243097761 - 2⁹ = 243097249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243097763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111151 + ... + 113316.

It is an arithmetic number, because the mean of its divisors is an integer number (28507436).

Almost surely, 2^243097761 is an apocalyptic number.

It is an amenable number.

243097761 is a deficient number, since it is larger than the sum of its proper divisors (98991471).

243097761 is a wasteful number, since it uses less digits than its factorization.

243097761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224508 (or 224489 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 243097761 is about 15591.5926383420. The cubic root of 243097761 is about 624.1088192657.

The spelling of 243097761 in words is "two hundred forty-three million, ninety-seven thousand, seven hundred sixty-one".