686620103 has 16 divisors (see below), whose sum is σ = 751396800. Its totient is φ = 623635200.

The previous prime is 686620097. The next prime is 686620171. The reversal of 686620103 is 301026686.

It is a cyclic number.

It is not a de Polignac number, because 686620103 - 2¹⁶ = 686554567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686620103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686620183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212363 + ... + 215571.

It is an arithmetic number, because the mean of its divisors is an integer number (46962300).

Almost surely, 2^686620103 is an apocalyptic number.

686620103 is a deficient number, since it is larger than the sum of its proper divisors (64776697).

686620103 is a wasteful number, since it uses less digits than its factorization.

686620103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 686620103 is about 26203.4368547334. The cubic root of 686620103 is about 882.2103966715.

Adding to 686620103 its reverse (301026686), we get a palindrome (987646789).

The spelling of 686620103 in words is "six hundred eighty-six million, six hundred twenty thousand, one hundred three".