620903 has 4 divisors (see below), whose sum is σ = 625920. Its totient is φ = 615888.

The previous prime is 620887. The next prime is 620909. The reversal of 620903 is 309026.

It is a happy number.

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 620903 - 2⁴ = 620887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620903.

It is not an unprimeable number, because it can be changed into a prime (620909) 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, 2318 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (156480).

2⁶²⁰⁹⁰³ is an apocalyptic number.

620903 is a deficient number, since it is larger than the sum of its proper divisors (5017).

620903 is a wasteful number, since it uses less digits than its factorization.

620903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 620903 is about 787.9739843421. The cubic root of 620903 is about 85.3115670532.

Adding to 620903 its reverse (309026), we get a palindrome (929929).

The spelling of 620903 in words is "six hundred twenty thousand, nine hundred three".