686623487707 has 4 divisors (see below), whose sum is σ = 687015174280. Its totient is φ = 686231801136.

The previous prime is 686623487701. The next prime is 686623487713. The reversal of 686623487707 is 707784326686.

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

It is an interprime number because it is at equal distance from previous prime (686623487701) and next prime (686623487713).

It is a cyclic number.

It is not a de Polignac number, because 686623487707 - 2²³ = 686615099099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686623487701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195840657 + ... + 195844162.

It is an arithmetic number, because the mean of its divisors is an integer number (171753793570).

Almost surely, 2^686623487707 is an apocalyptic number.

686623487707 is a deficient number, since it is larger than the sum of its proper divisors (391686573).

686623487707 is a wasteful number, since it uses less digits than its factorization.

686623487707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391686572.

The product of its (nonzero) digits is 113799168, while the sum is 64.

The spelling of 686623487707 in words is "six hundred eighty-six billion, six hundred twenty-three million, four hundred eighty-seven thousand, seven hundred seven".