194201897191 has 2 divisors, whose sum is σ = 194201897192. Its totient is φ = 194201897190.

The previous prime is 194201897143. The next prime is 194201897233. The reversal of 194201897191 is 191798102491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194201897191 - 2¹⁹ = 194201372903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194201837191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97100948595 + 97100948596.

It is an arithmetic number, because the mean of its divisors is an integer number (97100948596).

Almost surely, 2^194201897191 is an apocalyptic number.

194201897191 is a deficient number, since it is larger than the sum of its proper divisors (1).

194201897191 is an equidigital number, since it uses as much as digits as its factorization.

194201897191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 52.

The spelling of 194201897191 in words is "one hundred ninety-four billion, two hundred one million, eight hundred ninety-seven thousand, one hundred ninety-one".