243872743 has 2 divisors, whose sum is σ = 243872744. Its totient is φ = 243872742.

The previous prime is 243872731. The next prime is 243872747. The reversal of 243872743 is 347278342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243872743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243872696 and 243872705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243872747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121936371 + 121936372.

It is an arithmetic number, because the mean of its divisors is an integer number (121936372).

Almost surely, 2^243872743 is an apocalyptic number.

243872743 is a deficient number, since it is larger than the sum of its proper divisors (1).

243872743 is an equidigital number, since it uses as much as digits as its factorization.

243872743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 40.

The square root of 243872743 is about 15616.4254232523. The cubic root of 243872743 is about 624.7713237016.

The spelling of 243872743 in words is "two hundred forty-three million, eight hundred seventy-two thousand, seven hundred forty-three".