987585775 has 24 divisors (see below), whose sum is σ = 1343382768. Its totient is φ = 714240000.

The previous prime is 987585769. The next prime is 987585821. The reversal of 987585775 is 577585789.

It is not a de Polignac number, because 987585775 - 2¹⁷ = 987454703 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 39855 + ... + 59695.

It is an arithmetic number, because the mean of its divisors is an integer number (55974282).

Almost surely, 2^987585775 is an apocalyptic number.

987585775 is a deficient number, since it is larger than the sum of its proper divisors (355796993).

987585775 is a wasteful number, since it uses less digits than its factorization.

987585775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20043 (or 20038 counting only the distinct ones).

The product of its digits is 24696000, while the sum is 61.

The square root of 987585775 is about 31425.8774738272. The cubic root of 987585775 is about 995.8446822506.

The spelling of 987585775 in words is "nine hundred eighty-seven million, five hundred eighty-five thousand, seven hundred seventy-five".