8971490861 has 16 divisors (see below), whose sum is σ = 9312668160. Its totient is φ = 8633701440.

The previous prime is 8971490849. The next prime is 8971490867. The reversal of 8971490861 is 1680941798.

8971490861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8971490861 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8971490867) 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 15 ways as a sum of consecutive naturals, for example, 5374535 + ... + 5376203.

It is an arithmetic number, because the mean of its divisors is an integer number (582041760).

Almost surely, 2^8971490861 is an apocalyptic number.

It is an amenable number.

8971490861 is a deficient number, since it is larger than the sum of its proper divisors (341177299).

8971490861 is a wasteful number, since it uses less digits than its factorization.

8971490861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 8971490861 is about 94717.9542695048. The cubic root of 8971490861 is about 2077.8851517459.

The spelling of 8971490861 in words is "eight billion, nine hundred seventy-one million, four hundred ninety thousand, eight hundred sixty-one".