987755 has 4 divisors (see below), whose sum is σ = 1185312. Its totient is φ = 790200.

The previous prime is 987739. The next prime is 987793. The reversal of 987755 is 557789.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 987755 - 2⁴ = 987739 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an unprimeable number.

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, 98771 + ... + 98780.

It is an arithmetic number, because the mean of its divisors is an integer number (296328).

2⁹⁸⁷⁷⁵⁵ is an apocalyptic number.

987755 is a deficient number, since it is larger than the sum of its proper divisors (197557).

987755 is a wasteful number, since it uses less digits than its factorization.

987755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197556.

The product of its digits is 88200, while the sum is 41.

The square root of 987755 is about 993.8586418601. The cubic root of 987755 is about 99.5901559063.

The spelling of 987755 in words is "nine hundred eighty-seven thousand, seven hundred fifty-five".