123843 has 4 divisors (see below), whose sum is σ = 165128. Its totient is φ = 82560.

The previous prime is 123833. The next prime is 123853. The reversal of 123843 is 348321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348321 = 3 ⋅116107.

It is an interprime number because it is at equal distance from previous prime (123833) and next prime (123853).

It is not a de Polignac number, because 123843 - 2¹⁰ = 122819 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (123803) 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, 20638 + ... + 20643.

It is an arithmetic number, because the mean of its divisors is an integer number (41282).

2¹²³⁸⁴³ is an apocalyptic number.

123843 is a deficient number, since it is larger than the sum of its proper divisors (41285).

123843 is an equidigital number, since it uses as much as digits as its factorization.

123843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41284.

The product of its digits is 576, while the sum is 21.

The square root of 123843 is about 351.9133416056. The cubic root of 123843 is about 49.8452549065.

The spelling of 123843 in words is "one hundred twenty-three thousand, eight hundred forty-three".