203103023197 has 2 divisors, whose sum is σ = 203103023198. Its totient is φ = 203103023196.

The previous prime is 203103023191. The next prime is 203103023243. The reversal of 203103023197 is 791320301302.

It is a happy number.

203103023197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148491539716 + 54611483481 = 385346^2 + 233691^2 .

It is a cyclic number.

It is not a de Polignac number, because 203103023197 - 2⁷ = 203103023069 is a prime.

It is a super-2 number, since 2×203103023197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203103023191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101551511598 + 101551511599.

It is an arithmetic number, because the mean of its divisors is an integer number (101551511599).

Almost surely, 2^203103023197 is an apocalyptic number.

It is an amenable number.

203103023197 is a deficient number, since it is larger than the sum of its proper divisors (1).

203103023197 is an equidigital number, since it uses as much as digits as its factorization.

203103023197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

Adding to 203103023197 its reverse (791320301302), we get a palindrome (994423324499).

The spelling of 203103023197 in words is "two hundred three billion, one hundred three million, twenty-three thousand, one hundred ninety-seven".