200000243 has 2 divisors, whose sum is σ = 200000244. Its totient is φ = 200000242.

The previous prime is 200000239. The next prime is 200000299. The reversal of 200000243 is 342000002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200000243 - 2² = 200000239 is a prime.

It is not a weakly prime, because it can be changed into another prime (200000543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000121 + 100000122.

It is an arithmetic number, because the mean of its divisors is an integer number (100000122).

Almost surely, 2^200000243 is an apocalyptic number.

200000243 is a deficient number, since it is larger than the sum of its proper divisors (1).

200000243 is an equidigital number, since it uses as much as digits as its factorization.

200000243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 200000243 is about 14142.1442150757. The cubic root of 200000243 is about 584.8037844879.

Adding to 200000243 its reverse (342000002), we get a palindrome (542000245).

The spelling of 200000243 in words is "two hundred million, two hundred forty-three", and thus it is an aban number.