191118653197 has 2 divisors, whose sum is σ = 191118653198. Its totient is φ = 191118653196.

The previous prime is 191118653149. The next prime is 191118653221. The reversal of 191118653197 is 791356811191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104746733316 + 86371919881 = 323646^2 + 293891^2 .

It is a cyclic number.

It is not a de Polignac number, because 191118653197 - 2⁷ = 191118653069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191118653797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95559326598 + 95559326599.

It is an arithmetic number, because the mean of its divisors is an integer number (95559326599).

Almost surely, 2^191118653197 is an apocalyptic number.

It is an amenable number.

191118653197 is a deficient number, since it is larger than the sum of its proper divisors (1).

191118653197 is an equidigital number, since it uses as much as digits as its factorization.

191118653197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 52.

The spelling of 191118653197 in words is "one hundred ninety-one billion, one hundred eighteen million, six hundred fifty-three thousand, one hundred ninety-seven".