987550 has 12 divisors (see below), whose sum is σ = 1836936. Its totient is φ = 395000.

The previous prime is 987541. The next prime is 987559. The reversal of 987550 is 55789.

It is an interprime number because it is at equal distance from previous prime (987541) and next prime (987559).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987559) 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, 9826 + ... + 9925.

It is an arithmetic number, because the mean of its divisors is an integer number (153078).

2⁹⁸⁷⁵⁵⁰ is an apocalyptic number.

987550 is a deficient number, since it is larger than the sum of its proper divisors (849386).

987550 is a wasteful number, since it uses less digits than its factorization.

987550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19763 (or 19758 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 987550 is about 993.7555031294. The cubic root of 987550 is about 99.5832657380.

The spelling of 987550 in words is "nine hundred eighty-seven thousand, five hundred fifty".