17011689509 has 2 divisors, whose sum is σ = 17011689510. Its totient is φ = 17011689508.

The previous prime is 17011689437. The next prime is 17011689547. The reversal of 17011689509 is 90598611071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13351802500 + 3659887009 = 115550^2 + 60497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17011689509 is a prime.

It is a super-2 number, since 2×17011689509² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17011689589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8505844754 + 8505844755.

It is an arithmetic number, because the mean of its divisors is an integer number (8505844755).

Almost surely, 2^17011689509 is an apocalyptic number.

It is an amenable number.

17011689509 is a deficient number, since it is larger than the sum of its proper divisors (1).

17011689509 is an equidigital number, since it uses as much as digits as its factorization.

17011689509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 47.

The spelling of 17011689509 in words is "seventeen billion, eleven million, six hundred eighty-nine thousand, five hundred nine".