503109 has 6 divisors (see below), whose sum is σ = 726726. Its totient is φ = 335400.

The previous prime is 503077. The next prime is 503123. The reversal of 503109 is 901305.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 6084 = 705^2 + 78^2 .

It is not a de Polignac number, because 503109 - 2⁵ = 503077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 503091 and 503100.

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 503109.

It is not an unprimeable number, because it can be changed into a prime (503159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27942 + ... + 27959.

It is an arithmetic number, because the mean of its divisors is an integer number (121121).

2⁵⁰³¹⁰⁹ is an apocalyptic number.

It is an amenable number.

503109 is a deficient number, since it is larger than the sum of its proper divisors (223617).

503109 is a wasteful number, since it uses less digits than its factorization.

503109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55907 (or 55904 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 503109 is about 709.3017693479. The cubic root of 503109 is about 79.5342204642.

The spelling of 503109 in words is "five hundred three thousand, one hundred nine".