203945269321 has 2 divisors, whose sum is σ = 203945269322. Its totient is φ = 203945269320.

The previous prime is 203945269309. The next prime is 203945269343. The reversal of 203945269321 is 123962549302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201596510025 + 2348759296 = 448995^2 + 48464^2 .

It is a cyclic number.

It is not a de Polignac number, because 203945269321 - 2⁷ = 203945269193 is a prime.

It is not a weakly prime, because it can be changed into another prime (203945269361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101972634660 + 101972634661.

It is an arithmetic number, because the mean of its divisors is an integer number (101972634661).

Almost surely, 2^203945269321 is an apocalyptic number.

It is an amenable number.

203945269321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203945269321 is an equidigital number, since it uses as much as digits as its factorization.

203945269321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 203945269321 in words is "two hundred three billion, nine hundred forty-five million, two hundred sixty-nine thousand, three hundred twenty-one".