8891169849 has 15 divisors (see below), whose sum is σ = 13283138847. Its totient is φ = 5926880808.

The previous prime is 8891169803. The next prime is 8891169851. The reversal of 8891169849 is 9489611988.

The square root of 8891169849 is 94293.

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

8891169849 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 only one way, i.e., 6744515625 + 2146654224 = 82125^2 + 46332^2 .

It is not a de Polignac number, because 8891169849 - 2²⁷ = 8756952121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8891161849) 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 14 ways as a sum of consecutive naturals, for example, 843399 + ... + 853875.

Almost surely, 2^8891169849 is an apocalyptic number.

8891169849 is the 94293-rd square number.

8891169849 is the 47147-th centered octagonal number.

It is an amenable number.

8891169849 is a deficient number, since it is larger than the sum of its proper divisors (4391968998).

8891169849 is an frugal number, since it uses more digits than its factorization.

8891169849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20966 (or 10480 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 63.

The cubic root of 8891169849 is about 2071.6655089839.

The spelling of 8891169849 in words is "eight billion, eight hundred ninety-one million, one hundred sixty-nine thousand, eight hundred forty-nine".