243763249 has 2 divisors, whose sum is σ = 243763250. Its totient is φ = 243763248.

The previous prime is 243763243. The next prime is 243763313. The reversal of 243763249 is 942367342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233478400 + 10284849 = 15280^2 + 3207^2 .

It is a cyclic number.

It is not a de Polignac number, because 243763249 - 2¹⁵ = 243730481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243763243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121881624 + 121881625.

It is an arithmetic number, because the mean of its divisors is an integer number (121881625).

Almost surely, 2^243763249 is an apocalyptic number.

It is an amenable number.

243763249 is a deficient number, since it is larger than the sum of its proper divisors (1).

243763249 is an equidigital number, since it uses as much as digits as its factorization.

243763249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 40.

The square root of 243763249 is about 15612.9192978123. The cubic root of 243763249 is about 624.6778064146.

The spelling of 243763249 in words is "two hundred forty-three million, seven hundred sixty-three thousand, two hundred forty-nine".