243935983 has 2 divisors, whose sum is σ = 243935984. Its totient is φ = 243935982.

The previous prime is 243935977. The next prime is 243936013. The reversal of 243935983 is 389539342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243935983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243933983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121967991 + 121967992.

It is an arithmetic number, because the mean of its divisors is an integer number (121967992).

Almost surely, 2^243935983 is an apocalyptic number.

243935983 is a deficient number, since it is larger than the sum of its proper divisors (1).

243935983 is an equidigital number, since it uses as much as digits as its factorization.

243935983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 46.

The square root of 243935983 is about 15618.4500831549. The cubic root of 243935983 is about 624.8253233455.

The spelling of 243935983 in words is "two hundred forty-three million, nine hundred thirty-five thousand, nine hundred eighty-three".