633423 has 24 divisors (see below), whose sum is σ = 1021440. Its totient is φ = 347760.

The previous prime is 633407. The next prime is 633427. The reversal of 633423 is 324336.

It is not a de Polignac number, because 633423 - 2⁴ = 633407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 633423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4488 + ... + 4626.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2⁶³³⁴²³ is an apocalyptic number.

633423 is a deficient number, since it is larger than the sum of its proper divisors (388017).

633423 is a wasteful number, since it uses less digits than its factorization.

633423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 180 counting only the distinct ones).

The product of its digits is 1296, while the sum is 21.

The square root of 633423 is about 795.8787596110. The cubic root of 633423 is about 85.8811681295.

Adding to 633423 its reverse (324336), we get a palindrome (957759).

It can be divided in two parts, 63 and 3423, that added together give a triangular number (3486 = T₈₃).

The spelling of 633423 in words is "six hundred thirty-three thousand, four hundred twenty-three".