170081971 has 4 divisors (see below), whose sum is σ = 170159200. Its totient is φ = 170004744.

The previous prime is 170081953. The next prime is 170081983. The reversal of 170081971 is 179180071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179180071 = 7 ⋅25597153.

It is a cyclic number.

It is not a de Polignac number, because 170081971 - 2⁷ = 170081843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170081911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35211 + ... + 39748.

It is an arithmetic number, because the mean of its divisors is an integer number (42539800).

Almost surely, 2^170081971 is an apocalyptic number.

170081971 is a deficient number, since it is larger than the sum of its proper divisors (77229).

170081971 is an equidigital number, since it uses as much as digits as its factorization.

170081971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77228.

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 170081971 is about 13041.5478759233. The cubic root of 170081971 is about 554.0548488836.

The spelling of 170081971 in words is "one hundred seventy million, eighty-one thousand, nine hundred seventy-one".