194071622417 has 2 divisors, whose sum is σ = 194071622418. Its totient is φ = 194071622416.

The previous prime is 194071622399. The next prime is 194071622557. The reversal of 194071622417 is 714226170491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125848272001 + 68223350416 = 354751^2 + 261196^2 .

It is an emirp because it is prime and its reverse (714226170491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194071622417 - 2²⁰ = 194070573841 is a prime.

It is not a weakly prime, because it can be changed into another prime (194071625417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97035811208 + 97035811209.

It is an arithmetic number, because the mean of its divisors is an integer number (97035811209).

Almost surely, 2^194071622417 is an apocalyptic number.

It is an amenable number.

194071622417 is a deficient number, since it is larger than the sum of its proper divisors (1).

194071622417 is an equidigital number, since it uses as much as digits as its factorization.

194071622417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 194071622417 in words is "one hundred ninety-four billion, seventy-one million, six hundred twenty-two thousand, four hundred seventeen".