8398681 has 4 divisors (see below), whose sum is σ = 8411364. Its totient is φ = 8386000.

The previous prime is 8398679. The next prime is 8398721. The reversal of 8398681 is 1868938.

It is a happy number.

8398681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1868938 = 2 ⋅934469.

It can be written as a sum of positive squares in 2 ways, for example, as 7750656 + 648025 = 2784^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398681 - 2¹ = 8398679 is a prime.

It is a super-2 number, since 2×8398681² = 141075685079522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8398601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5290 + ... + 6691.

It is an arithmetic number, because the mean of its divisors is an integer number (2102841).

Almost surely, 2^8398681 is an apocalyptic number.

It is an amenable number.

8398681 is a deficient number, since it is larger than the sum of its proper divisors (12683).

8398681 is a wasteful number, since it uses less digits than its factorization.

8398681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12682.

The product of its digits is 82944, while the sum is 43.

The square root of 8398681 is about 2898.0477911863. The cubic root of 8398681 is about 203.2686309108.

The spelling of 8398681 in words is "eight million, three hundred ninety-eight thousand, six hundred eighty-one".