987971706 has 36 divisors (see below), whose sum is σ = 2200078062. Its totient is φ = 320415264.

The previous prime is 987971689. The next prime is 987971713. The reversal of 987971706 is 607179789.

987971706 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 3 ways, for example, as 946485225 + 41486481 = 30765^2 + 6441^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4596 + ... + 44688.

Almost surely, 2^987971706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987971706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100039031).

987971706 is an abundant number, since it is smaller than the sum of its proper divisors (1212106356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

987971706 is a wasteful number, since it uses less digits than its factorization.

987971706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40175 (or 40135 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 54.

The square root of 987971706 is about 31432.0172117540. The cubic root of 987971706 is about 995.9743848350.

The spelling of 987971706 in words is "nine hundred eighty-seven million, nine hundred seventy-one thousand, seven hundred six".