243373750019 has 2 divisors, whose sum is σ = 243373750020. Its totient is φ = 243373750018.

The previous prime is 243373750007. The next prime is 243373750049. The reversal of 243373750019 is 910057373342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243373750019 is a prime.

It is a super-2 number, since 2×243373750019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243373750049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121686875009 + 121686875010.

It is an arithmetic number, because the mean of its divisors is an integer number (121686875010).

Almost surely, 2^243373750019 is an apocalyptic number.

243373750019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243373750019 is an equidigital number, since it uses as much as digits as its factorization.

243373750019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 44.

The spelling of 243373750019 in words is "two hundred forty-three billion, three hundred seventy-three million, seven hundred fifty thousand, nineteen".