201910109197 has 2 divisors, whose sum is σ = 201910109198. Its totient is φ = 201910109196.

The previous prime is 201910109171. The next prime is 201910109209. The reversal of 201910109197 is 791901019102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189996604996 + 11913504201 = 435886^2 + 109149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201910109197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201910109897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100955054598 + 100955054599.

It is an arithmetic number, because the mean of its divisors is an integer number (100955054599).

Almost surely, 2^201910109197 is an apocalyptic number.

It is an amenable number.

201910109197 is a deficient number, since it is larger than the sum of its proper divisors (1).

201910109197 is an equidigital number, since it uses as much as digits as its factorization.

201910109197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 201910109197 in words is "two hundred one billion, nine hundred ten million, one hundred nine thousand, one hundred ninety-seven".