423663 has 4 divisors (see below), whose sum is σ = 564888. Its totient is φ = 282440.

The previous prime is 423649. The next prime is 423667. The reversal of 423663 is 366324.

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 423663 - 2¹² = 419567 is a prime.

It is a D-number.

423663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423667) 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, 70608 + ... + 70613.

It is an arithmetic number, because the mean of its divisors is an integer number (141222).

2⁴²³⁶⁶³ is an apocalyptic number.

423663 is a deficient number, since it is larger than the sum of its proper divisors (141225).

423663 is a wasteful number, since it uses less digits than its factorization.

423663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141224.

The product of its digits is 2592, while the sum is 24.

The square root of 423663 is about 650.8940005869. The cubic root of 423663 is about 75.1058062193.

Adding to 423663 its reverse (366324), we get a palindrome (789987).

The spelling of 423663 in words is "four hundred twenty-three thousand, six hundred sixty-three".