243849043 has 2 divisors, whose sum is σ = 243849044. Its totient is φ = 243849042.

The previous prime is 243849031. The next prime is 243849077. The reversal of 243849043 is 340948342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243849043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243848993 and 243849011.

It is not a weakly prime, because it can be changed into another prime (243849143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121924521 + 121924522.

It is an arithmetic number, because the mean of its divisors is an integer number (121924522).

Almost surely, 2^243849043 is an apocalyptic number.

243849043 is a deficient number, since it is larger than the sum of its proper divisors (1).

243849043 is an equidigital number, since it uses as much as digits as its factorization.

243849043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 243849043 is about 15615.6665883977. Note that the first 3 decimals coincide. The cubic root of 243849043 is about 624.7510842387.

The spelling of 243849043 in words is "two hundred forty-three million, eight hundred forty-nine thousand, forty-three".