8319681 has 12 divisors (see below), whose sum is σ = 12724452. Its totient is φ = 5220096.

The previous prime is 8319677. The next prime is 8319691. The reversal of 8319681 is 1869138.

It can be written as a sum of positive squares in 2 ways, for example, as 6843456 + 1476225 = 2616^2 + 1215^2 .

It is not a de Polignac number, because 8319681 - 2² = 8319677 is a prime.

It is a super-2 number, since 2×8319681² = 138434183883522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8319691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27036 + ... + 27341.

It is an arithmetic number, because the mean of its divisors is an integer number (1060371).

Almost surely, 2^8319681 is an apocalyptic number.

It is an amenable number.

8319681 is a deficient number, since it is larger than the sum of its proper divisors (4404771).

8319681 is a wasteful number, since it uses less digits than its factorization.

8319681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54400 (or 54397 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8319681 is about 2884.3857231653. The cubic root of 8319681 is about 202.6292910046.

The spelling of 8319681 in words is "eight million, three hundred nineteen thousand, six hundred eighty-one".