623503 has 4 divisors (see below), whose sum is σ = 643648. Its totient is φ = 603360.

The previous prime is 623477. The next prime is 623521. The reversal of 623503 is 305326.

623503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 623503 - 2¹⁷ = 492431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623563) 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, 10026 + ... + 10087.

It is an arithmetic number, because the mean of its divisors is an integer number (160912).

2⁶²³⁵⁰³ is an apocalyptic number.

623503 is a deficient number, since it is larger than the sum of its proper divisors (20145).

623503 is a wasteful number, since it uses less digits than its factorization.

623503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20144.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 623503 is about 789.6220614952. The cubic root of 623503 is about 85.4304805208.

Adding to 623503 its reverse (305326), we get a palindrome (928829).

The spelling of 623503 in words is "six hundred twenty-three thousand, five hundred three".