194328701993 has 2 divisors, whose sum is σ = 194328701994. Its totient is φ = 194328701992.

The previous prime is 194328701953. The next prime is 194328702031. The reversal of 194328701993 is 399107823491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194328443929 + 258064 = 440827^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 194328701993 - 2¹² = 194328697897 is a prime.

It is not a weakly prime, because it can be changed into another prime (194328701953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97164350996 + 97164350997.

It is an arithmetic number, because the mean of its divisors is an integer number (97164350997).

Almost surely, 2^194328701993 is an apocalyptic number.

It is an amenable number.

194328701993 is a deficient number, since it is larger than the sum of its proper divisors (1).

194328701993 is an equidigital number, since it uses as much as digits as its factorization.

194328701993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 194328701993 in words is "one hundred ninety-four billion, three hundred twenty-eight million, seven hundred one thousand, nine hundred ninety-three".