987655 has 8 divisors (see below), whose sum is σ = 1207872. Its totient is φ = 775008.

The previous prime is 987631. The next prime is 987659. The reversal of 987655 is 556789.

It is a happy number.

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 987655 - 2⁹ = 987143 is a prime.

It is a Duffinian number.

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 (987659) 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, 1599 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (150984).

2⁹⁸⁷⁶⁵⁵ is an apocalyptic number.

987655 is a deficient number, since it is larger than the sum of its proper divisors (220217).

987655 is a wasteful number, since it uses less digits than its factorization.

987655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785.

The product of its digits is 75600, while the sum is 40.

The square root of 987655 is about 993.8083316213. The cubic root of 987655 is about 99.5867949677.

The spelling of 987655 in words is "nine hundred eighty-seven thousand, six hundred fifty-five".