8299397681 has 8 divisors (see below), whose sum is σ = 8360114664. Its totient is φ = 8238827520.

The previous prime is 8299397629. The next prime is 8299397699. The reversal of 8299397681 is 1867939928.

It can be written as a sum of positive squares in 4 ways, for example, as 2209000000 + 6090397681 = 47000^2 + 78041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8299397681 - 2¹⁴ = 8299381297 is a prime.

It is a super-2 number, since 2×8299397681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8299397611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78065 + ... + 150641.

It is an arithmetic number, because the mean of its divisors is an integer number (1045014333).

Almost surely, 2^8299397681 is an apocalyptic number.

It is an amenable number.

8299397681 is a deficient number, since it is larger than the sum of its proper divisors (60716983).

8299397681 is a wasteful number, since it uses less digits than its factorization.

8299397681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73411.

The product of its digits is 11757312, while the sum is 62.

The square root of 8299397681 is about 91101.0300765035. The cubic root of 8299397681 is about 2024.6448744522.

The spelling of 8299397681 in words is "eight billion, two hundred ninety-nine million, three hundred ninety-seven thousand, six hundred eighty-one".