423623 has 4 divisors (see below), whose sum is σ = 448560. Its totient is φ = 398688.

The previous prime is 423617. The next prime is 423649. The reversal of 423623 is 326324.

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 423623 - 2⁶ = 423559 is a prime.

It is a super-2 number, since 2×423623² = 358912892258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423595 and 423604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423323) 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, 12443 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (112140).

2⁴²³⁶²³ is an apocalyptic number.

423623 is a deficient number, since it is larger than the sum of its proper divisors (24937).

423623 is a wasteful number, since it uses less digits than its factorization.

423623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24936.

The product of its digits is 864, while the sum is 20.

The square root of 423623 is about 650.8632728922. The cubic root of 423623 is about 75.1034424484.

Adding to 423623 its reverse (326324), we get a palindrome (749947).

The spelling of 423623 in words is "four hundred twenty-three thousand, six hundred twenty-three".