170971 has 2 divisors, whose sum is σ = 170972. Its totient is φ = 170970.

The previous prime is 170957. The next prime is 171007. The reversal of 170971 is 179071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170971 - 2⁷ = 170843 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (170921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85485 + 85486.

It is an arithmetic number, because the mean of its divisors is an integer number (85486).

2¹⁷⁰⁹⁷¹ is an apocalyptic number.

170971 is a deficient number, since it is larger than the sum of its proper divisors (1).

170971 is an equidigital number, since it uses as much as digits as its factorization.

170971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441, while the sum is 25.

The square root of 170971 is about 413.4863963905. The cubic root of 170971 is about 55.5018531427.

Subtracting 170971 from its reverse (179071), we obtain a square (8100 = 90²).

The spelling of 170971 in words is "one hundred seventy thousand, nine hundred seventy-one".