191120023 has 2 divisors, whose sum is σ = 191120024. Its totient is φ = 191120022.

The previous prime is 191120011. The next prime is 191120029. The reversal of 191120023 is 320021191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191120023 - 2²¹ = 189022871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191120029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95560011 + 95560012.

It is an arithmetic number, because the mean of its divisors is an integer number (95560012).

Almost surely, 2^191120023 is an apocalyptic number.

191120023 is a deficient number, since it is larger than the sum of its proper divisors (1).

191120023 is an equidigital number, since it uses as much as digits as its factorization.

191120023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 191120023 is about 13824.6165588779. The cubic root of 191120023 is about 576.0171265082.

The spelling of 191120023 in words is "one hundred ninety-one million, one hundred twenty thousand, twenty-three".