987705 has 24 divisors (see below), whose sum is σ = 1752192. Its totient is φ = 514464.

The previous prime is 987697. The next prime is 987713. The reversal of 987705 is 507789.

987705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (987697) and next prime (987713).

It is not a de Polignac number, because 987705 - 2³ = 987697 is a prime.

It is a super-2 number, since 2×987705² = 1951122334050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 987705.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1882 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (73008).

2⁹⁸⁷⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

987705 is a deficient number, since it is larger than the sum of its proper divisors (764487).

987705 is a wasteful number, since it uses less digits than its factorization.

987705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 987705 is about 993.8334870591. The cubic root of 987705 is about 99.5884754653.

The spelling of 987705 in words is "nine hundred eighty-seven thousand, seven hundred five".