987027889 has 9 divisors (see below), whose sum is σ = 1001078593. Its totient is φ = 973172992.

The previous prime is 987027883. The next prime is 987027901. The reversal of 987027889 is 988720789.

The square root of 987027889 is 31417.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 168610225 + 818417664 = 12985^2 + 28608^2 .

It is not a de Polignac number, because 987027889 - 2¹³ = 987019697 is a prime.

It is a super-3 number, since 3×987027889³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987027883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2795937 + ... + 2796289.

Almost surely, 2^987027889 is an apocalyptic number.

987027889 is the 31417-th square number.

987027889 is the 15709-th centered octagonal number.

It is an amenable number.

987027889 is a deficient number, since it is larger than the sum of its proper divisors (14050704).

987027889 is an frugal number, since it uses more digits than its factorization.

987027889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 58.

The cubic root of 987027889 is about 995.6571297812.

The spelling of 987027889 in words is "nine hundred eighty-seven million, twenty-seven thousand, eight hundred eighty-nine".