8539294681 has 4 divisors (see below), whose sum is σ = 8539747492. Its totient is φ = 8538841872.

The previous prime is 8539294679. The next prime is 8539294691. The reversal of 8539294681 is 1864929358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4852376281 + 3686918400 = 69659^2 + 60720^2 .

It is a cyclic number.

It is not a de Polignac number, because 8539294681 - 2¹ = 8539294679 is a prime.

It is a super-2 number, since 2×8539294681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8539294601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196830 + ... + 236263.

It is an arithmetic number, because the mean of its divisors is an integer number (2134936873).

Almost surely, 2^8539294681 is an apocalyptic number.

It is an amenable number.

8539294681 is a deficient number, since it is larger than the sum of its proper divisors (452811).

8539294681 is a wasteful number, since it uses less digits than its factorization.

8539294681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452810.

The product of its digits is 3732480, while the sum is 55.

The square root of 8539294681 is about 92408.3041777091. The cubic root of 8539294681 is about 2043.9675669637.

The spelling of 8539294681 in words is "eight billion, five hundred thirty-nine million, two hundred ninety-four thousand, six hundred eighty-one".