8686491 has 8 divisors (see below), whose sum is σ = 12634944. Its totient is φ = 5264520.

The previous prime is 8686487. The next prime is 8686499. The reversal of 8686491 is 1946868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8686491 - 2² = 8686487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8686499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131581 + ... + 131646.

It is an arithmetic number, because the mean of its divisors is an integer number (1579368).

Almost surely, 2^8686491 is an apocalyptic number.

8686491 is a deficient number, since it is larger than the sum of its proper divisors (3948453).

8686491 is a wasteful number, since it uses less digits than its factorization.

8686491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263241.

The product of its digits is 82944, while the sum is 42.

The square root of 8686491 is about 2947.2853611417. The cubic root of 8686491 is about 205.5645039959.

The spelling of 8686491 in words is "eight million, six hundred eighty-six thousand, four hundred ninety-one".