623403 has 16 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 377640.

The previous prime is 623401. The next prime is 623417. The reversal of 623403 is 304326.

623403 is a `hidden beast` number, since 623 + 40 + 3 = 666.

It is not a de Polignac number, because 623403 - 2¹ = 623401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 753 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2⁶²³⁴⁰³ is an apocalyptic number.

623403 is a deficient number, since it is larger than the sum of its proper divisors (384597).

623403 is a wasteful number, since it uses less digits than its factorization.

623403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 623403 is about 789.5587375237. The cubic root of 623403 is about 85.4259130449.

Adding to 623403 its reverse (304326), we get a palindrome (927729).

It can be divided in two parts, 6 and 23403, that added together give a square (23409 = 153²).

The spelling of 623403 in words is "six hundred twenty-three thousand, four hundred three".