170428171 has 2 divisors, whose sum is σ = 170428172. Its totient is φ = 170428170.

The previous prime is 170428169. The next prime is 170428189. The reversal of 170428171 is 171824071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170428171 - 2¹ = 170428169 is a prime.

It is a super-2 number, since 2×170428171² = 58091522940810482, which contains 22 as substring.

Together with 170428169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (170428121) 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, 85214085 + 85214086.

It is an arithmetic number, because the mean of its divisors is an integer number (85214086).

Almost surely, 2^170428171 is an apocalyptic number.

170428171 is a deficient number, since it is larger than the sum of its proper divisors (1).

170428171 is an equidigital number, since it uses as much as digits as its factorization.

170428171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 170428171 is about 13054.8140928931. The cubic root of 170428171 is about 554.4305183124.

The spelling of 170428171 in words is "one hundred seventy million, four hundred twenty-eight thousand, one hundred seventy-one".