609903 has 24 divisors (see below), whose sum is σ = 1053360. Its totient is φ = 347760.

The previous prime is 609887. The next prime is 609907. The reversal of 609903 is 309906.

It is not a de Polignac number, because 609903 - 2⁴ = 609887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

609903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1093 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (43890).

2⁶⁰⁹⁹⁰³ is an apocalyptic number.

609903 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

609903 is a deficient number, since it is larger than the sum of its proper divisors (443457).

609903 is a wasteful number, since it uses less digits than its factorization.

609903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 609903 is about 780.9628672351. The cubic root of 609903 is about 84.8047652923.

The spelling of 609903 in words is "six hundred nine thousand, nine hundred three".