170017121 has 2 divisors, whose sum is σ = 170017122. Its totient is φ = 170017120.

The previous prime is 170017087. The next prime is 170017129. The reversal of 170017121 is 121710071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170015521 + 1600 = 13039^2 + 40^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170017121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 170017093 and 170017102.

It is not a weakly prime, because it can be changed into another prime (170017129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85008560 + 85008561.

It is an arithmetic number, because the mean of its divisors is an integer number (85008561).

Almost surely, 2^170017121 is an apocalyptic number.

It is an amenable number.

170017121 is a deficient number, since it is larger than the sum of its proper divisors (1).

170017121 is an equidigital number, since it uses as much as digits as its factorization.

170017121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 170017121 is about 13039.0613542540. The cubic root of 170017121 is about 553.9844220098.

Adding to 170017121 its reverse (121710071), we get a palindrome (291727192).

The spelling of 170017121 in words is "one hundred seventy million, seventeen thousand, one hundred twenty-one".