987771485 has 8 divisors (see below), whose sum is σ = 1255050936. Its totient is φ = 743733760.

The previous prime is 987771469. The next prime is 987771503. The reversal of 987771485 is 584177789.

987771485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 394459321 + 593312164 = 19861^2 + 24358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 987771485 - 2⁴ = 987771469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987771485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5810336 + ... + 5810505.

It is an arithmetic number, because the mean of its divisors is an integer number (156881367).

Almost surely, 2^987771485 is an apocalyptic number.

It is an amenable number.

987771485 is a deficient number, since it is larger than the sum of its proper divisors (267279451).

987771485 is a wasteful number, since it uses less digits than its factorization.

987771485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11620863.

The product of its digits is 3951360, while the sum is 56.

The square root of 987771485 is about 31428.8320654777. The cubic root of 987771485 is about 995.9070993522.

The spelling of 987771485 in words is "nine hundred eighty-seven million, seven hundred seventy-one thousand, four hundred eighty-five".