243674761 has 12 divisors (see below), whose sum is σ = 272901636. Its totient is φ = 217337120.

The previous prime is 243674759. The next prime is 243674771. The reversal of 243674761 is 167476342.

It can be written as a sum of positive squares in 2 ways, for example, as 210830400 + 32844361 = 14520^2 + 5731^2 .

It is not a de Polignac number, because 243674761 - 2¹ = 243674759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243674701) 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 in 11 ways as a sum of consecutive naturals, for example, 12586 + ... + 25411.

It is an arithmetic number, because the mean of its divisors is an integer number (22741803).

Almost surely, 2^243674761 is an apocalyptic number.

It is an amenable number.

243674761 is a deficient number, since it is larger than the sum of its proper divisors (29226875).

243674761 is a wasteful number, since it uses less digits than its factorization.

243674761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38072 (or 38061 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 243674761 is about 15610.0852335918. The cubic root of 243674761 is about 624.6022095942.

The spelling of 243674761 in words is "two hundred forty-three million, six hundred seventy-four thousand, seven hundred sixty-one".