191066053 has 2 divisors, whose sum is σ = 191066054. Its totient is φ = 191066052.

The previous prime is 191066047. The next prime is 191066087. The reversal of 191066053 is 350660191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154306084 + 36759969 = 12422^2 + 6063^2 .

It is a cyclic number.

It is not a de Polignac number, because 191066053 - 2¹⁷ = 190934981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191066093) 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, 95533026 + 95533027.

It is an arithmetic number, because the mean of its divisors is an integer number (95533027).

Almost surely, 2^191066053 is an apocalyptic number.

It is an amenable number.

191066053 is a deficient number, since it is larger than the sum of its proper divisors (1).

191066053 is an equidigital number, since it uses as much as digits as its factorization.

191066053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 191066053 is about 13822.6644681841. The cubic root of 191066053 is about 575.9629012966.

The spelling of 191066053 in words is "one hundred ninety-one million, sixty-six thousand, fifty-three".