171005089 has 2 divisors, whose sum is σ = 171005090. Its totient is φ = 171005088.

The previous prime is 171005041. The next prime is 171005099. The reversal of 171005089 is 980500171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159390625 + 11614464 = 12625^2 + 3408^2 .

It is a cyclic number.

It is not a de Polignac number, because 171005089 - 2⁷ = 171004961 is a prime.

It is a super-4 number, since 4×171005089⁴ (a number of 34 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171005089.

It is not a weakly prime, because it can be changed into another prime (171005099) 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 as a sum of consecutive naturals, namely, 85502544 + 85502545.

It is an arithmetic number, because the mean of its divisors is an integer number (85502545).

Almost surely, 2^171005089 is an apocalyptic number.

It is an amenable number.

171005089 is a deficient number, since it is larger than the sum of its proper divisors (1).

171005089 is an equidigital number, since it uses as much as digits as its factorization.

171005089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 171005089 is about 13076.8914119526. The cubic root of 171005089 is about 555.0554163749.

The spelling of 171005089 in words is "one hundred seventy-one million, five thousand, eighty-nine".