623903 has 8 divisors (see below), whose sum is σ = 750720. Its totient is φ = 506520.

The previous prime is 623893. The next prime is 623923. The reversal of 623903 is 309326.

It is a happy number.

623903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623903 - 2⁶ = 623839 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 (623923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213 + ... + 2478.

It is an arithmetic number, because the mean of its divisors is an integer number (93840).

2⁶²³⁹⁰³ is an apocalyptic number.

623903 is a deficient number, since it is larger than the sum of its proper divisors (126817).

623903 is a wasteful number, since it uses less digits than its factorization.

623903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 623903 is about 789.8753066149. The cubic root of 623903 is about 85.4487455424.

The spelling of 623903 in words is "six hundred twenty-three thousand, nine hundred three".