8187897169 has 9 divisors (see below), whose sum is σ = 8396277211. Its totient is φ = 7984572880.

The previous prime is 8187897143. The next prime is 8187897197. The reversal of 8187897169 is 9617987818.

It is a happy number.

The square root of 8187897169 is 90487.

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

8187897169 is digitally balanced in base 3, 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., 394538769 + 7793358400 = 19863^2 + 88280^2 .

It is not a de Polignac number, because 8187897169 - 2⁹ = 8187896657 is a prime.

It is a super-2 number, since 2×8187897169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8187897169.

It is not an unprimeable number, because it can be changed into a prime (8187897199) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3708864 + ... + 3711070.

Almost surely, 2^8187897169 is an apocalyptic number.

8187897169 is the 90487-th square number.

8187897169 is the 45244-th centered octagonal number.

It is an amenable number.

8187897169 is a deficient number, since it is larger than the sum of its proper divisors (208380042).

8187897169 is an frugal number, since it uses more digits than its factorization.

8187897169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496 (or 2248 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 64.

The cubic root of 8187897169 is about 2015.5370843657.

Multiplying 8187897169 by its sum of digits (64), we get a square (524025418816 = 723896²).

It can be divided in two parts, 818 and 7897169, that added together give a palindrome (7897987).

The spelling of 8187897169 in words is "eight billion, one hundred eighty-seven million, eight hundred ninety-seven thousand, one hundred sixty-nine".