170497985 has 16 divisors (see below), whose sum is σ = 241370112. Its totient is φ = 113140800.

The previous prime is 170497969. The next prime is 170497991. The reversal of 170497985 is 589794071.

It is not a de Polignac number, because 170497985 - 2⁴ = 170497969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77486 + ... + 79655.

It is an arithmetic number, because the mean of its divisors is an integer number (15085632).

Almost surely, 2^170497985 is an apocalyptic number.

It is an amenable number.

170497985 is a deficient number, since it is larger than the sum of its proper divisors (70872127).

170497985 is a wasteful number, since it uses less digits than its factorization.

170497985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157184.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 170497985 is about 13057.4876986348. The cubic root of 170497985 is about 554.5062134041.

The spelling of 170497985 in words is "one hundred seventy million, four hundred ninety-seven thousand, nine hundred eighty-five".