17000021617 has 2 divisors, whose sum is σ = 17000021618. Its totient is φ = 17000021616.

The previous prime is 17000021587. The next prime is 17000021651. The reversal of 17000021617 is 71612000071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10642191921 + 6357829696 = 103161^2 + 79736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17000021617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17000021591 and 17000021600.

It is not a weakly prime, because it can be changed into another prime (17000021117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8500010808 + 8500010809.

It is an arithmetic number, because the mean of its divisors is an integer number (8500010809).

Almost surely, 2^17000021617 is an apocalyptic number.

It is an amenable number.

17000021617 is a deficient number, since it is larger than the sum of its proper divisors (1).

17000021617 is an equidigital number, since it uses as much as digits as its factorization.

17000021617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

Adding to 17000021617 its reverse (71612000071), we get a palindrome (88612021688).

The spelling of 17000021617 in words is "seventeen billion, twenty-one thousand, six hundred seventeen".