243198983 has 2 divisors, whose sum is σ = 243198984. Its totient is φ = 243198982.

The previous prime is 243198979. The next prime is 243199001. The reversal of 243198983 is 389891342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243198983 - 2² = 243198979 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243198973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121599491 + 121599492.

It is an arithmetic number, because the mean of its divisors is an integer number (121599492).

Almost surely, 2^243198983 is an apocalyptic number.

243198983 is a deficient number, since it is larger than the sum of its proper divisors (1).

243198983 is an equidigital number, since it uses as much as digits as its factorization.

243198983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 243198983 is about 15594.8383447858. The cubic root of 243198983 is about 624.1954302057.

The spelling of 243198983 in words is "two hundred forty-three million, one hundred ninety-eight thousand, nine hundred eighty-three".