191748553 has 2 divisors, whose sum is σ = 191748554. Its totient is φ = 191748552.

The previous prime is 191748527. The next prime is 191748569. The reversal of 191748553 is 355847191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158432569 + 33315984 = 12587^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 191748553 - 2⁵ = 191748521 is a prime.

It is not a weakly prime, because it can be changed into another prime (191748353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95874276 + 95874277.

It is an arithmetic number, because the mean of its divisors is an integer number (95874277).

Almost surely, 2^191748553 is an apocalyptic number.

It is an amenable number.

191748553 is a deficient number, since it is larger than the sum of its proper divisors (1).

191748553 is an equidigital number, since it uses as much as digits as its factorization.

191748553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 191748553 is about 13847.3301758859. The cubic root of 191748553 is about 576.6478782939.

The spelling of 191748553 in words is "one hundred ninety-one million, seven hundred forty-eight thousand, five hundred fifty-three".