170117287 has 4 divisors (see below), whose sum is σ = 170185536. Its totient is φ = 170049040.

The previous prime is 170117251. The next prime is 170117303. The reversal of 170117287 is 782711071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782711071 = 409 ⋅1913719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170117287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170117587) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30238 + ... + 35419.

It is an arithmetic number, because the mean of its divisors is an integer number (42546384).

Almost surely, 2^170117287 is an apocalyptic number.

170117287 is a deficient number, since it is larger than the sum of its proper divisors (68249).

170117287 is an equidigital number, since it uses as much as digits as its factorization.

170117287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68248.

The product of its (nonzero) digits is 5488, while the sum is 34.

The square root of 170117287 is about 13042.9017860291. The cubic root of 170117287 is about 554.0931944076.

The spelling of 170117287 in words is "one hundred seventy million, one hundred seventeen thousand, two hundred eighty-seven".