987645 has 8 divisors (see below), whose sum is σ = 1580256. Its totient is φ = 526736.

The previous prime is 987631. The next prime is 987659. The reversal of 987645 is 546789.

It is an interprime number because it is at equal distance from previous prime (987631) and next prime (987659).

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 987645 - 2¹¹ = 985597 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987645.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32907 + ... + 32936.

It is an arithmetic number, because the mean of its divisors is an integer number (197532).

2⁹⁸⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

987645 is a deficient number, since it is larger than the sum of its proper divisors (592611).

987645 is a wasteful number, since it uses less digits than its factorization.

987645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65851.

The product of its digits is 60480, while the sum is 39.

The square root of 987645 is about 993.8033004574. The cubic root of 987645 is about 99.5864588613.

The spelling of 987645 in words is "nine hundred eighty-seven thousand, six hundred forty-five".