8681897394 has 24 divisors (see below), whose sum is σ = 18919517292. Its totient is φ = 2877236640.

The previous prime is 8681897351. The next prime is 8681897447. The reversal of 8681897394 is 4937981868.

8681897394 is a `hidden beast` number, since 8 + 68 + 189 + 7 + 394 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8651790225 + 30107169 = 93015^2 + 5487^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1390897 + ... + 1397124.

Almost surely, 2^8681897394 is an apocalyptic number.

8681897394 is an abundant number, since it is smaller than the sum of its proper divisors (10237619898).

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

8681897394 is a wasteful number, since it uses less digits than its factorization.

8681897394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788202 (or 2788199 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 8681897394 is about 93176.6998449720. The cubic root of 8681897394 is about 2055.2826194143.

The spelling of 8681897394 in words is "eight billion, six hundred eighty-one million, eight hundred ninety-seven thousand, three hundred ninety-four".