5623123 has 4 divisors (see below), whose sum is σ = 6134328. Its totient is φ = 5111920.

The previous prime is 5623103. The next prime is 5623133. The reversal of 5623123 is 3213265.

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

It is not a de Polignac number, because 5623123 - 2¹⁷ = 5492051 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5623094 and 5623103.

It is not an unprimeable number, because it can be changed into a prime (5623103) 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, 255586 + ... + 255607.

It is an arithmetic number, because the mean of its divisors is an integer number (1533582).

Almost surely, 2^5623123 is an apocalyptic number.

5623123 is a deficient number, since it is larger than the sum of its proper divisors (511205).

5623123 is a wasteful number, since it uses less digits than its factorization.

5623123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511204.

The product of its digits is 1080, while the sum is 22.

The square root of 5623123 is about 2371.3125057655. The cubic root of 5623123 is about 177.8248814276.

Adding to 5623123 its reverse (3213265), we get a palindrome (8836388).

The spelling of 5623123 in words is "five million, six hundred twenty-three thousand, one hundred twenty-three".