165500017 has 2 divisors, whose sum is σ = 165500018. Its totient is φ = 165500016.

The previous prime is 165500011. The next prime is 165500057. The reversal of 165500017 is 710005561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87778161 + 77721856 = 9369^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 165500017 - 2⁷ = 165499889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165499964 and 165500000.

It is not a weakly prime, because it can be changed into another prime (165500011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750008 + 82750009.

It is an arithmetic number, because the mean of its divisors is an integer number (82750009).

Almost surely, 2^165500017 is an apocalyptic number.

It is an amenable number.

165500017 is a deficient number, since it is larger than the sum of its proper divisors (1).

165500017 is an equidigital number, since it uses as much as digits as its factorization.

165500017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 165500017 is about 12864.6809909924. The cubic root of 165500017 is about 549.0341362291.

Adding to 165500017 its reverse (710005561), we get a palindrome (875505578).

The spelling of 165500017 in words is "one hundred sixty-five million, five hundred thousand, seventeen".