170387 has 8 divisors (see below), whose sum is σ = 197472. Its totient is φ = 144000.

The previous prime is 170383. The next prime is 170389. The reversal of 170387 is 783071.

170387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 170387 - 2² = 170383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (24684).

2¹⁷⁰³⁸⁷ is an apocalyptic number.

170387 is a deficient number, since it is larger than the sum of its proper divisors (27085).

170387 is a wasteful number, since it uses less digits than its factorization.

170387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 170387 is about 412.7796022092. The cubic root of 170387 is about 55.4385869400.

The spelling of 170387 in words is "one hundred seventy thousand, three hundred eighty-seven".