191292191 has 2 divisors, whose sum is σ = 191292192. Its totient is φ = 191292190.

The previous prime is 191292161. The next prime is 191292197.

191292191 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 191292191 - 2¹⁰ = 191291167 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191292197) 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, 95646095 + 95646096.

It is an arithmetic number, because the mean of its divisors is an integer number (95646096).

Almost surely, 2^191292191 is an apocalyptic number.

191292191 is a deficient number, since it is larger than the sum of its proper divisors (1).

191292191 is an equidigital number, since it uses as much as digits as its factorization.

191292191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 35.

The square root of 191292191 is about 13830.8420206436. The cubic root of 191292191 is about 576.1900404548.

The spelling of 191292191 in words is "one hundred ninety-one million, two hundred ninety-two thousand, one hundred ninety-one".