194126917 has 2 divisors, whose sum is σ = 194126918. Its totient is φ = 194126916.

The previous prime is 194126909. The next prime is 194126941. The reversal of 194126917 is 719621491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193043236 + 1083681 = 13894^2 + 1041^2 .

It is an emirp because it is prime and its reverse (719621491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194126917 - 2³ = 194126909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194126917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194126017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97063458 + 97063459.

It is an arithmetic number, because the mean of its divisors is an integer number (97063459).

Almost surely, 2^194126917 is an apocalyptic number.

It is an amenable number.

194126917 is a deficient number, since it is larger than the sum of its proper divisors (1).

194126917 is an equidigital number, since it uses as much as digits as its factorization.

194126917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 194126917 is about 13932.9435870530. The cubic root of 194126917 is about 579.0222498044.

The spelling of 194126917 in words is "one hundred ninety-four million, one hundred twenty-six thousand, nine hundred seventeen".