170020017 has 6 divisors (see below), whose sum is σ = 245584482. Its totient is φ = 113346672.

The previous prime is 170020003. The next prime is 170020021. The reversal of 170020017 is 710020071.

It can be written as a sum of positive squares in only one way, i.e., 112275216 + 57744801 = 10596^2 + 7599^2 .

It is not a de Polignac number, because 170020017 - 2¹² = 170015921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (170020057) 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 in 5 ways as a sum of consecutive naturals, for example, 9445548 + ... + 9445565.

It is an arithmetic number, because the mean of its divisors is an integer number (40930747).

Almost surely, 2^170020017 is an apocalyptic number.

It is an amenable number.

170020017 is a deficient number, since it is larger than the sum of its proper divisors (75564465).

170020017 is a wasteful number, since it uses less digits than its factorization.

170020017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18891119 (or 18891116 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 170020017 is about 13039.1724047196. The cubic root of 170020017 is about 553.9875674377.

Adding to 170020017 its reverse (710020071), we get a palindrome (880040088).

The spelling of 170020017 in words is "one hundred seventy million, twenty thousand, seventeen".