203897586197 has 2 divisors, whose sum is σ = 203897586198. Its totient is φ = 203897586196.

The previous prime is 203897586149. The next prime is 203897586199. The reversal of 203897586197 is 791685798302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112460293201 + 91437292996 = 335351^2 + 302386^2 .

It is a cyclic number.

It is not a de Polignac number, because 203897586197 - 2¹⁰ = 203897585173 is a prime.

Together with 203897586199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203897586199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101948793098 + 101948793099.

It is an arithmetic number, because the mean of its divisors is an integer number (101948793099).

Almost surely, 2^203897586197 is an apocalyptic number.

It is an amenable number.

203897586197 is a deficient number, since it is larger than the sum of its proper divisors (1).

203897586197 is an equidigital number, since it uses as much as digits as its factorization.

203897586197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 65.

The spelling of 203897586197 in words is "two hundred three billion, eight hundred ninety-seven million, five hundred eighty-six thousand, one hundred ninety-seven".