9871217316 has 81 divisors (see below), whose sum is σ = 25887672993. Its totient is φ = 3171379680.

The previous prime is 9871217311. The next prime is 9871217327. The reversal of 9871217316 is 6137121789.

The square root of 9871217316 is 99354.

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

It can be written as a sum of positive squares in only one way, i.e., 5176226916 + 4694990400 = 71946^2 + 68520^2 .

It is not an unprimeable number, because it can be changed into a prime (9871217311) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17287311 + ... + 17287881.

Almost surely, 2^9871217316 is an apocalyptic number.

9871217316 is the 99354-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9871217316

9871217316 is an abundant number, since it is smaller than the sum of its proper divisors (16016455677).

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

9871217316 is a wasteful number, since it uses less digits than its factorization.

9871217316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 605 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The cubic root of 9871217316 is about 2145.1462393980.

The spelling of 9871217316 in words is "nine billion, eight hundred seventy-one million, two hundred seventeen thousand, three hundred sixteen".