8686381 has 4 divisors (see below), whose sum is σ = 9476064. Its totient is φ = 7896700.

The previous prime is 8686373. The next prime is 8686397. The reversal of 8686381 is 1836868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8686381 - 2³ = 8686373 is a prime.

It is a super-2 number, since 2×8686381² = 150906429754322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8686361) 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, 394825 + ... + 394846.

It is an arithmetic number, because the mean of its divisors is an integer number (2369016).

Almost surely, 2^8686381 is an apocalyptic number.

It is an amenable number.

8686381 is a deficient number, since it is larger than the sum of its proper divisors (789683).

8686381 is a wasteful number, since it uses less digits than its factorization.

8686381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789682.

The product of its digits is 55296, while the sum is 40.

The square root of 8686381 is about 2947.2666998424. The cubic root of 8686381 is about 205.5636362811.

The spelling of 8686381 in words is "eight million, six hundred eighty-six thousand, three hundred eighty-one".