5643123 has 4 divisors (see below), whose sum is σ = 7524168. Its totient is φ = 3762080.

The previous prime is 5643109. The next prime is 5643137. The reversal of 5643123 is 3213465.

It is a happy number.

5643123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5643109) and next prime (5643137).

It is a cyclic number.

It is not a de Polignac number, because 5643123 - 2⁵ = 5643091 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 5643093 and 5643102.

It is not an unprimeable number, because it can be changed into a prime (5643103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940518 + ... + 940523.

It is an arithmetic number, because the mean of its divisors is an integer number (1881042).

Almost surely, 2^5643123 is an apocalyptic number.

5643123 is a deficient number, since it is larger than the sum of its proper divisors (1881045).

5643123 is a wasteful number, since it uses less digits than its factorization.

5643123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881044.

The product of its digits is 2160, while the sum is 24.

The square root of 5643123 is about 2375.5258365255. The cubic root of 5643123 is about 178.0354577345.

Adding to 5643123 its reverse (3213465), we get a palindrome (8856588).

The spelling of 5643123 in words is "five million, six hundred forty-three thousand, one hundred twenty-three".