203943393811 has 2 divisors, whose sum is σ = 203943393812. Its totient is φ = 203943393810.

The previous prime is 203943393779. The next prime is 203943393943. The reversal of 203943393811 is 118393349302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203943393811 - 2⁵ = 203943393779 is a prime.

It is not a weakly prime, because it can be changed into another prime (203943313811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101971696905 + 101971696906.

It is an arithmetic number, because the mean of its divisors is an integer number (101971696906).

Almost surely, 2^203943393811 is an apocalyptic number.

203943393811 is a deficient number, since it is larger than the sum of its proper divisors (1).

203943393811 is an equidigital number, since it uses as much as digits as its factorization.

203943393811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 203943393811 in words is "two hundred three billion, nine hundred forty-three million, three hundred ninety-three thousand, eight hundred eleven".