987903 has 16 divisors (see below), whose sum is σ = 1672960. Its totient is φ = 564408.

The previous prime is 987869. The next prime is 987911. The reversal of 987903 is 309789.

It is not a de Polignac number, because 987903 - 2⁹ = 987391 is a prime.

It is a Duffinian number.

987903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2425 + ... + 2802.

It is an arithmetic number, because the mean of its divisors is an integer number (104560).

2⁹⁸⁷⁹⁰³ is an apocalyptic number.

987903 is a deficient number, since it is larger than the sum of its proper divisors (685057).

987903 is a wasteful number, since it uses less digits than its factorization.

987903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243 (or 5237 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 987903 is about 993.9330963400. The cubic root of 987903 is about 99.5951296791.

It can be divided in two parts, 98 and 7903, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 987903 in words is "nine hundred eighty-seven thousand, nine hundred three".