243201943 has 2 divisors, whose sum is σ = 243201944. Its totient is φ = 243201942.

The previous prime is 243201929. The next prime is 243201961. The reversal of 243201943 is 349102342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243201943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243208943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600971 + 121600972.

It is an arithmetic number, because the mean of its divisors is an integer number (121600972).

Almost surely, 2^243201943 is an apocalyptic number.

243201943 is a deficient number, since it is larger than the sum of its proper divisors (1).

243201943 is an equidigital number, since it uses as much as digits as its factorization.

243201943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 243201943 is about 15594.9332476930. The cubic root of 243201943 is about 624.1979625778.

The spelling of 243201943 in words is "two hundred forty-three million, two hundred one thousand, nine hundred forty-three".