987503 has 8 divisors (see below), whose sum is σ = 1088640. Its totient is φ = 888280.

The previous prime is 987491. The next prime is 987509. The reversal of 987503 is 305789.

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

It is a cyclic number.

It is not a de Polignac number, because 987503 - 2¹² = 983407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987503.

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 987503.

It is not an unprimeable number, because it can be changed into a prime (987509) 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, 758 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2⁹⁸⁷⁵⁰³ is an apocalyptic number.

987503 is a deficient number, since it is larger than the sum of its proper divisors (101137).

987503 is a wasteful number, since it uses less digits than its factorization.

987503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957.

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

The square root of 987503 is about 993.7318551803. The cubic root of 987503 is about 99.5816859065.

The spelling of 987503 in words is "nine hundred eighty-seven thousand, five hundred three".