243440983 has 2 divisors, whose sum is σ = 243440984. Its totient is φ = 243440982.

The previous prime is 243440971. The next prime is 243440987. The reversal of 243440983 is 389044342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243440983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243440987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121720491 + 121720492.

It is an arithmetic number, because the mean of its divisors is an integer number (121720492).

Almost surely, 2^243440983 is an apocalyptic number.

243440983 is a deficient number, since it is larger than the sum of its proper divisors (1).

243440983 is an equidigital number, since it uses as much as digits as its factorization.

243440983 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 243440983 is about 15602.5953930748. The cubic root of 243440983 is about 624.4024009427.

The spelling of 243440983 in words is "two hundred forty-three million, four hundred forty thousand, nine hundred eighty-three".