193830317557 has 2 divisors, whose sum is σ = 193830317558. Its totient is φ = 193830317556.

The previous prime is 193830317543. The next prime is 193830317671. The reversal of 193830317557 is 755713038391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186238854916 + 7591462641 = 431554^2 + 87129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193830317557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193830311557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96915158778 + 96915158779.

It is an arithmetic number, because the mean of its divisors is an integer number (96915158779).

Almost surely, 2^193830317557 is an apocalyptic number.

It is an amenable number.

193830317557 is a deficient number, since it is larger than the sum of its proper divisors (1).

193830317557 is an equidigital number, since it uses as much as digits as its factorization.

193830317557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 193830317557 in words is "one hundred ninety-three billion, eight hundred thirty million, three hundred seventeen thousand, five hundred fifty-seven".