686328827 has 4 divisors (see below), whose sum is σ = 700931616. Its totient is φ = 671726040.

The previous prime is 686328817. The next prime is 686328829. The reversal of 686328827 is 728823686.

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 686328827 - 2¹⁴ = 686312443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686328829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7301324 + ... + 7301417.

It is an arithmetic number, because the mean of its divisors is an integer number (175232904).

Almost surely, 2^686328827 is an apocalyptic number.

686328827 is a deficient number, since it is larger than the sum of its proper divisors (14602789).

686328827 is a wasteful number, since it uses less digits than its factorization.

686328827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14602788.

The product of its digits is 1548288, while the sum is 50.

The square root of 686328827 is about 26197.8782919533. The cubic root of 686328827 is about 882.0856294436.

The spelling of 686328827 in words is "six hundred eighty-six million, three hundred twenty-eight thousand, eight hundred twenty-seven".