243956965943 has 2 divisors, whose sum is σ = 243956965944. Its totient is φ = 243956965942.

The previous prime is 243956965897. The next prime is 243956965963. The reversal of 243956965943 is 349569659342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243956965943 - 2⁸ = 243956965687 is a prime.

It is a super-2 number, since 2×243956965943² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243956965943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243956965963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121978482971 + 121978482972.

It is an arithmetic number, because the mean of its divisors is an integer number (121978482972).

Almost surely, 2^243956965943 is an apocalyptic number.

243956965943 is a deficient number, since it is larger than the sum of its proper divisors (1).

243956965943 is an equidigital number, since it uses as much as digits as its factorization.

243956965943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188956800, while the sum is 65.

The spelling of 243956965943 in words is "two hundred forty-three billion, nine hundred fifty-six million, nine hundred sixty-five thousand, nine hundred forty-three".