203105197 has 2 divisors, whose sum is σ = 203105198. Its totient is φ = 203105196.

The previous prime is 203105167. The next prime is 203105213. The reversal of 203105197 is 791501302.

203105197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185749641 + 17355556 = 13629^2 + 4166^2 .

It is a cyclic number.

It is not a de Polignac number, because 203105197 - 2¹⁹ = 202580909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203105107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101552598 + 101552599.

It is an arithmetic number, because the mean of its divisors is an integer number (101552599).

Almost surely, 2^203105197 is an apocalyptic number.

It is an amenable number.

203105197 is a deficient number, since it is larger than the sum of its proper divisors (1).

203105197 is an equidigital number, since it uses as much as digits as its factorization.

203105197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 203105197 is about 14251.4980616074. The cubic root of 203105197 is about 587.8145683429.

Adding to 203105197 its reverse (791501302), we get a palindrome (994606499).

It can be divided in two parts, 203105 and 197, that added together give a palindrome (203302).

The spelling of 203105197 in words is "two hundred three million, one hundred five thousand, one hundred ninety-seven".