203808528197 has 2 divisors, whose sum is σ = 203808528198. Its totient is φ = 203808528196.

The previous prime is 203808528169. The next prime is 203808528223. The reversal of 203808528197 is 791825808302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202512600196 + 1295928001 = 450014^2 + 35999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203808528197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203808528107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101904264098 + 101904264099.

It is an arithmetic number, because the mean of its divisors is an integer number (101904264099).

Almost surely, 2^203808528197 is an apocalyptic number.

It is an amenable number.

203808528197 is a deficient number, since it is larger than the sum of its proper divisors (1).

203808528197 is an equidigital number, since it uses as much as digits as its factorization.

203808528197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 203808528197 in words is "two hundred three billion, eight hundred eight million, five hundred twenty-eight thousand, one hundred ninety-seven".