8688131 has 4 divisors (see below), whose sum is σ = 8852112. Its totient is φ = 8524152.

The previous prime is 8688109. The next prime is 8688133. The reversal of 8688131 is 1318868.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8688131 - 2⁶ = 8688067 is a prime.

It is a super-2 number, since 2×8688131² = 150967240546322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8688091 and 8688100.

It is not an unprimeable number, because it can be changed into a prime (8688133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81911 + ... + 82016.

It is an arithmetic number, because the mean of its divisors is an integer number (2213028).

Almost surely, 2^8688131 is an apocalyptic number.

8688131 is a deficient number, since it is larger than the sum of its proper divisors (163981).

8688131 is a wasteful number, since it uses less digits than its factorization.

8688131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163980.

The product of its digits is 9216, while the sum is 35.

The square root of 8688131 is about 2947.5635701372. The cubic root of 8688131 is about 205.5774399664.

The spelling of 8688131 in words is "eight million, six hundred eighty-eight thousand, one hundred thirty-one".