191106457 has 2 divisors, whose sum is σ = 191106458. Its totient is φ = 191106456.

The previous prime is 191106449. The next prime is 191106527. The reversal of 191106457 is 754601191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191102976 + 3481 = 13824^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 191106457 - 2³ = 191106449 is a prime.

It is not a weakly prime, because it can be changed into another prime (191106437) 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, 95553228 + 95553229.

It is an arithmetic number, because the mean of its divisors is an integer number (95553229).

Almost surely, 2^191106457 is an apocalyptic number.

It is an amenable number.

191106457 is a deficient number, since it is larger than the sum of its proper divisors (1).

191106457 is an equidigital number, since it uses as much as digits as its factorization.

191106457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 191106457 is about 13824.1259036512. The cubic root of 191106457 is about 576.0034973183.

The spelling of 191106457 in words is "one hundred ninety-one million, one hundred six thousand, four hundred fifty-seven".