203223201997 has 2 divisors, whose sum is σ = 203223201998. Its totient is φ = 203223201996.

The previous prime is 203223201989. The next prime is 203223202027. The reversal of 203223201997 is 799102322302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189021474756 + 14201727241 = 434766^2 + 119171^2 .

It is a cyclic number.

It is not a de Polignac number, because 203223201997 - 2³ = 203223201989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203223201917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101611600998 + 101611600999.

It is an arithmetic number, because the mean of its divisors is an integer number (101611600999).

Almost surely, 2^203223201997 is an apocalyptic number.

It is an amenable number.

203223201997 is a deficient number, since it is larger than the sum of its proper divisors (1).

203223201997 is an equidigital number, since it uses as much as digits as its factorization.

203223201997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 203223201997 in words is "two hundred three billion, two hundred twenty-three million, two hundred one thousand, nine hundred ninety-seven".