243963427 has 2 divisors, whose sum is σ = 243963428. Its totient is φ = 243963426.

The previous prime is 243963403. The next prime is 243963443. The reversal of 243963427 is 724369342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243963427 - 2¹⁹ = 243439139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243963427.

It is not a weakly prime, because it can be changed into another prime (243913427) 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 as a sum of consecutive naturals, namely, 121981713 + 121981714.

It is an arithmetic number, because the mean of its divisors is an integer number (121981714).

Almost surely, 2^243963427 is an apocalyptic number.

243963427 is a deficient number, since it is larger than the sum of its proper divisors (1).

243963427 is an equidigital number, since it uses as much as digits as its factorization.

243963427 is an odious number, because the sum of its binary digits is odd.

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

The square root of 243963427 is about 15619.3286347397. The cubic root of 243963427 is about 624.8487544426.

The spelling of 243963427 in words is "two hundred forty-three million, nine hundred sixty-three thousand, four hundred twenty-seven".