503987 has 4 divisors (see below), whose sum is σ = 549816. Its totient is φ = 458160.

The previous prime is 503983. The next prime is 503989. The reversal of 503987 is 789305.

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 503987 - 2² = 503983 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 503987.

It is not an unprimeable number, because it can be changed into a prime (503983) 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 3 ways as a sum of consecutive naturals, for example, 22898 + ... + 22919.

It is an arithmetic number, because the mean of its divisors is an integer number (137454).

2⁵⁰³⁹⁸⁷ is an apocalyptic number.

503987 is a deficient number, since it is larger than the sum of its proper divisors (45829).

503987 is a wasteful number, since it uses less digits than its factorization.

503987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45828.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 503987 is about 709.9204180752. The cubic root of 503987 is about 79.5804599226.

It can be divided in two parts, 50398 and 7, that added together give a palindrome (50405).

The spelling of 503987 in words is "five hundred three thousand, nine hundred eighty-seven".