243787049 has 12 divisors (see below), whose sum is σ = 272365380. Its totient is φ = 217984800.

The previous prime is 243787039. The next prime is 243787057. The reversal of 243787049 is 940787342.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 241243024 = 1595^2 + 15532^2 .

It is not a de Polignac number, because 243787049 - 2²⁰ = 242738473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243787009) 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, 9134 + ... + 23895.

It is an arithmetic number, because the mean of its divisors is an integer number (22697115).

Almost surely, 2^243787049 is an apocalyptic number.

It is an amenable number.

243787049 is a deficient number, since it is larger than the sum of its proper divisors (28578331).

243787049 is a wasteful number, since it uses less digits than its factorization.

243787049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33112 (or 33101 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 243787049 is about 15613.6814685070. The cubic root of 243787049 is about 624.6981360418.

The spelling of 243787049 in words is "two hundred forty-three million, seven hundred eighty-seven thousand, forty-nine".