243043340387 has 2 divisors, whose sum is σ = 243043340388. Its totient is φ = 243043340386.

The previous prime is 243043340339. The next prime is 243043340413. The reversal of 243043340387 is 783043340342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243043340387 - 2⁸ = 243043340131 is a prime.

It is a super-2 number, since 2×243043340387² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243043340987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521670193 + 121521670194.

It is an arithmetic number, because the mean of its divisors is an integer number (121521670194).

Almost surely, 2^243043340387 is an apocalyptic number.

243043340387 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043340387 is an equidigital number, since it uses as much as digits as its factorization.

243043340387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 41.

The spelling of 243043340387 in words is "two hundred forty-three billion, forty-three million, three hundred forty thousand, three hundred eighty-seven".