163523 has 4 divisors (see below), whose sum is σ = 173160. Its totient is φ = 153888.

The previous prime is 163517. The next prime is 163543. The reversal of 163523 is 325361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325361 = 73 ⋅4457.

It is a cyclic number.

It is not a de Polignac number, because 163523 - 2¹⁰ = 162499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163495 and 163504.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 163523.

It is not an unprimeable number, because it can be changed into a prime (163543) 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, 4793 + ... + 4826.

It is an arithmetic number, because the mean of its divisors is an integer number (43290).

2¹⁶³⁵²³ is an apocalyptic number.

163523 is a deficient number, since it is larger than the sum of its proper divisors (9637).

163523 is an equidigital number, since it uses as much as digits as its factorization.

163523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636.

The product of its digits is 540, while the sum is 20.

The square root of 163523 is about 404.3797719966. The cubic root of 163523 is about 54.6839169897.

Adding to 163523 its reverse (325361), we get a palindrome (488884).

It can be divided in two parts, 163 and 523, that added together give a palindrome (686).

The spelling of 163523 in words is "one hundred sixty-three thousand, five hundred twenty-three".