423631 has 4 divisors (see below), whose sum is σ = 456232. Its totient is φ = 391032.

The previous prime is 423617. The next prime is 423649. The reversal of 423631 is 136324.

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 423631 - 2⁷ = 423503 is a prime.

It is a super-2 number, since 2×423631² = 358926448322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423599 and 423608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423601) 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, 16281 + ... + 16306.

It is an arithmetic number, because the mean of its divisors is an integer number (114058).

2⁴²³⁶³¹ is an apocalyptic number.

423631 is a deficient number, since it is larger than the sum of its proper divisors (32601).

423631 is a wasteful number, since it uses less digits than its factorization.

423631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32600.

The product of its digits is 432, while the sum is 19.

The square root of 423631 is about 650.8694185472. The cubic root of 423631 is about 75.1039152145.

Adding to 423631 its reverse (136324), we get a palindrome (559955).

The spelling of 423631 in words is "four hundred twenty-three thousand, six hundred thirty-one".