423669 has 4 divisors (see below), whose sum is σ = 564896. Its totient is φ = 282444.

The previous prime is 423667. The next prime is 423697. The reversal of 423669 is 966324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 423669 - 2¹ = 423667 is a prime.

It is a super-4 number, since 4×423669⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

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 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, 70609 + ... + 70614.

It is an arithmetic number, because the mean of its divisors is an integer number (141224).

2⁴²³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

423669 is a deficient number, since it is larger than the sum of its proper divisors (141227).

423669 is a wasteful number, since it uses less digits than its factorization.

423669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141226.

The product of its digits is 7776, while the sum is 30.

The square root of 423669 is about 650.8986096160. The cubic root of 423669 is about 75.1061607721.

The spelling of 423669 in words is "four hundred twenty-three thousand, six hundred sixty-nine".