243428823019 has 2 divisors, whose sum is σ = 243428823020. Its totient is φ = 243428823018.

The previous prime is 243428822999. The next prime is 243428823037. The reversal of 243428823019 is 910328824342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243428823019 is a prime.

It is a super-3 number, since 3×243428823019³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 243428823019.

It is not a weakly prime, because it can be changed into another prime (243428823089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121714411509 + 121714411510.

It is an arithmetic number, because the mean of its divisors is an integer number (121714411510).

Almost surely, 2^243428823019 is an apocalyptic number.

243428823019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243428823019 is an equidigital number, since it uses as much as digits as its factorization.

243428823019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 243428823019 in words is "two hundred forty-three billion, four hundred twenty-eight million, eight hundred twenty-three thousand, nineteen".