109523 has 4 divisors (see below), whose sum is σ = 113088. Its totient is φ = 105960.

The previous prime is 109519. The next prime is 109537. The reversal of 109523 is 325901.

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 109523 - 2² = 109519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109495 and 109504.

It is not an unprimeable number, because it can be changed into a prime (109583) 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, 1736 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (28272).

2¹⁰⁹⁵²³ is an apocalyptic number.

109523 is a deficient number, since it is larger than the sum of its proper divisors (3565).

109523 is an equidigital number, since it uses as much as digits as its factorization.

109523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 109523 is about 330.9425932092. The cubic root of 109523 is about 47.8448404236.

The spelling of 109523 in words is "one hundred nine thousand, five hundred twenty-three".