170947 has 4 divisors (see below), whose sum is σ = 195376. Its totient is φ = 146520.

The previous prime is 170927. The next prime is 170953. The reversal of 170947 is 749071.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 170947 - 2¹¹ = 168899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170927) 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, 12204 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (48844).

2¹⁷⁰⁹⁴⁷ is an apocalyptic number.

170947 is a deficient number, since it is larger than the sum of its proper divisors (24429).

170947 is an equidigital number, since it uses as much as digits as its factorization.

170947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24428.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 170947 is about 413.4573738610. The cubic root of 170947 is about 55.4992560028.

The spelling of 170947 in words is "one hundred seventy thousand, nine hundred forty-seven".