243421189603 has 2 divisors, whose sum is σ = 243421189604. Its totient is φ = 243421189602.

The previous prime is 243421189537. The next prime is 243421189639. The reversal of 243421189603 is 306981124342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243421189603 - 2²⁵ = 243387635171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243421189603.

It is not a weakly prime, because it can be changed into another prime (243421189303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710594801 + 121710594802.

It is an arithmetic number, because the mean of its divisors is an integer number (121710594802).

Almost surely, 2^243421189603 is an apocalyptic number.

243421189603 is a deficient number, since it is larger than the sum of its proper divisors (1).

243421189603 is an equidigital number, since it uses as much as digits as its factorization.

243421189603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 243421189603 in words is "two hundred forty-three billion, four hundred twenty-one million, one hundred eighty-nine thousand, six hundred three".