194130461009 has 2 divisors, whose sum is σ = 194130461010. Its totient is φ = 194130461008.

The previous prime is 194130461003. The next prime is 194130461017. The reversal of 194130461009 is 900164031491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193789246225 + 341214784 = 440215^2 + 18472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194130461009 is a prime.

It is not a weakly prime, because it can be changed into another prime (194130461003) 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, 97065230504 + 97065230505.

It is an arithmetic number, because the mean of its divisors is an integer number (97065230505).

Almost surely, 2^194130461009 is an apocalyptic number.

It is an amenable number.

194130461009 is a deficient number, since it is larger than the sum of its proper divisors (1).

194130461009 is an equidigital number, since it uses as much as digits as its factorization.

194130461009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 194130461009 in words is "one hundred ninety-four billion, one hundred thirty million, four hundred sixty-one thousand, nine".