123943 has 4 divisors (see below), whose sum is σ = 127008. Its totient is φ = 120880.

The previous prime is 123941. The next prime is 123953. The reversal of 123943 is 349321.

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 123943 - 2¹ = 123941 is a prime.

It is a Duffinian number.

123943 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123941) 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, 1471 + ... + 1552.

It is an arithmetic number, because the mean of its divisors is an integer number (31752).

2¹²³⁹⁴³ is an apocalyptic number.

123943 is a deficient number, since it is larger than the sum of its proper divisors (3065).

123943 is an equidigital number, since it uses as much as digits as its factorization.

123943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its digits is 648, while the sum is 22.

The square root of 123943 is about 352.0553933687. The cubic root of 123943 is about 49.8586675458.

The spelling of 123943 in words is "one hundred twenty-three thousand, nine hundred forty-three".