17065742209 has 2 divisors, whose sum is σ = 17065742210. Its totient is φ = 17065742208.

The previous prime is 17065742137. The next prime is 17065742227. The reversal of 17065742209 is 90224756071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16622429184 + 443313025 = 128928^2 + 21055^2 .

It is an emirp because it is prime and its reverse (90224756071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17065742209 - 2⁷ = 17065742081 is a prime.

It is not a weakly prime, because it can be changed into another prime (17065742269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8532871104 + 8532871105.

It is an arithmetic number, because the mean of its divisors is an integer number (8532871105).

Almost surely, 2^17065742209 is an apocalyptic number.

It is an amenable number.

17065742209 is a deficient number, since it is larger than the sum of its proper divisors (1).

17065742209 is an equidigital number, since it uses as much as digits as its factorization.

17065742209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 17065742209 in words is "seventeen billion, sixty-five million, seven hundred forty-two thousand, two hundred nine".