503205399 has 8 divisors (see below), whose sum is σ = 745489520. Its totient is φ = 335470248.

The previous prime is 503205371. The next prime is 503205401. The reversal of 503205399 is 993502305.

It is not a de Polignac number, because 503205399 - 2⁹ = 503204887 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 (503205319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9318592 + ... + 9318645.

It is an arithmetic number, because the mean of its divisors is an integer number (93186190).

Almost surely, 2^503205399 is an apocalyptic number.

503205399 is a deficient number, since it is larger than the sum of its proper divisors (242284121).

503205399 is a wasteful number, since it uses less digits than its factorization.

503205399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18637246 (or 18637240 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 36.

The square root of 503205399 is about 22432.2401690068. The cubic root of 503205399 is about 795.3929990007.

The spelling of 503205399 in words is "five hundred three million, two hundred five thousand, three hundred ninety-nine".