686708027 has 8 divisors (see below), whose sum is σ = 691275312. Its totient is φ = 682149600.

The previous prime is 686707999. The next prime is 686708039. The reversal of 686708027 is 720807686.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 686708027 - 2⁶ = 686707963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686708327) 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 7 ways as a sum of consecutive naturals, for example, 229652 + ... + 232622.

It is an arithmetic number, because the mean of its divisors is an integer number (86409414).

Almost surely, 2^686708027 is an apocalyptic number.

686708027 is a deficient number, since it is larger than the sum of its proper divisors (4567285).

686708027 is a wasteful number, since it uses less digits than its factorization.

686708027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 686708027 is about 26205.1145198795. The cubic root of 686708027 is about 882.2480517280.

The spelling of 686708027 in words is "six hundred eighty-six million, seven hundred eight thousand, twenty-seven".