109623 has 4 divisors (see below), whose sum is σ = 146168. Its totient is φ = 73080.

The previous prime is 109621. The next prime is 109639. The reversal of 109623 is 326901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326901 = 3 ⋅108967.

It is not a de Polignac number, because 109623 - 2¹ = 109621 is a prime.

It is a D-number.

It is a Duffinian number.

109623 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 109623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109621) 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, 18268 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (36542).

2¹⁰⁹⁶²³ is an apocalyptic number.

109623 is a deficient number, since it is larger than the sum of its proper divisors (36545).

109623 is an equidigital number, since it uses as much as digits as its factorization.

109623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36544.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 109623 is about 331.0936423431. The cubic root of 109623 is about 47.8593975749.

The spelling of 109623 in words is "one hundred nine thousand, six hundred twenty-three".