623440303 has 4 divisors (see below), whose sum is σ = 660113280. Its totient is φ = 586767328.

The previous prime is 623440297. The next prime is 623440319. The reversal of 623440303 is 303044326.

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 623440303 - 2²⁵ = 589885871 is a prime.

It is a super-2 number, since 2×623440303² = 777355622809463618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623440403) 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, 18336463 + ... + 18336496.

It is an arithmetic number, because the mean of its divisors is an integer number (165028320).

Almost surely, 2^623440303 is an apocalyptic number.

623440303 is a deficient number, since it is larger than the sum of its proper divisors (36672977).

623440303 is a wasteful number, since it uses less digits than its factorization.

623440303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36672976.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 623440303 is about 24968.7865744413. The cubic root of 623440303 is about 854.2761690757.

Adding to 623440303 its reverse (303044326), we get a palindrome (926484629).

The spelling of 623440303 in words is "six hundred twenty-three million, four hundred forty thousand, three hundred three".