191128741 has 2 divisors, whose sum is σ = 191128742. Its totient is φ = 191128740.

The previous prime is 191128709. The next prime is 191128783. The reversal of 191128741 is 147821191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170198116 + 20930625 = 13046^2 + 4575^2 .

It is a cyclic number.

It is not a de Polignac number, because 191128741 - 2⁵ = 191128709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191128697 and 191128706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191128541) 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, 95564370 + 95564371.

It is an arithmetic number, because the mean of its divisors is an integer number (95564371).

Almost surely, 2^191128741 is an apocalyptic number.

It is an amenable number.

191128741 is a deficient number, since it is larger than the sum of its proper divisors (1).

191128741 is an equidigital number, since it uses as much as digits as its factorization.

191128741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 34.

The square root of 191128741 is about 13824.9318623999. The cubic root of 191128741 is about 576.0258847759.

The spelling of 191128741 in words is "one hundred ninety-one million, one hundred twenty-eight thousand, seven hundred forty-one".