203313309932849 has 2 divisors, whose sum is σ = 203313309932850. Its totient is φ = 203313309932848.

The previous prime is 203313309932827. The next prime is 203313309932851. The reversal of 203313309932849 is 948239903313302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202053943426624 + 1259366506225 = 14214568^2 + 1122215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203313309932849 is a prime.

It is a Sophie Germain prime.

Together with 203313309932851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (203313309932819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101656654966424 + 101656654966425.

It is an arithmetic number, because the mean of its divisors is an integer number (101656654966425).

Almost surely, 2^{203313309932849} is an apocalyptic number.

It is an amenable number.

203313309932849 is a deficient number, since it is larger than the sum of its proper divisors (1).

203313309932849 is an equidigital number, since it uses as much as digits as its factorization.

203313309932849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22674816, while the sum is 59.

The spelling of 203313309932849 in words is "two hundred three trillion, three hundred thirteen billion, three hundred nine million, nine hundred thirty-two thousand, eight hundred forty-nine".