170923 has 4 divisors (see below), whose sum is σ = 173880. Its totient is φ = 167968.

The previous prime is 170921. The next prime is 170927. The reversal of 170923 is 329071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329071 = 109 ⋅3019.

It is a cyclic number.

It is not a de Polignac number, because 170923 - 2¹ = 170921 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 170894 and 170903.

It is not an unprimeable number, because it can be changed into a prime (170921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (43470).

2¹⁷⁰⁹²³ is an apocalyptic number.

170923 is a deficient number, since it is larger than the sum of its proper divisors (2957).

170923 is an equidigital number, since it uses as much as digits as its factorization.

170923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 170923 is about 413.4283492940. The cubic root of 170923 is about 55.4966586198.

Adding to 170923 its reverse (329071), we get a palindrome (499994).

The spelling of 170923 in words is "one hundred seventy thousand, nine hundred twenty-three".