686388113 has 2 divisors, whose sum is σ = 686388114. Its totient is φ = 686388112.

The previous prime is 686388083. The next prime is 686388119. The reversal of 686388113 is 311883686.

686388113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683979409 + 2408704 = 26153^2 + 1552^2 .

It is a cyclic number.

It is not a de Polignac number, because 686388113 - 2⁸ = 686387857 is a prime.

It is a super-2 number, since 2×686388113² = 942257283335401538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (686388119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343194056 + 343194057.

It is an arithmetic number, because the mean of its divisors is an integer number (343194057).

Almost surely, 2^686388113 is an apocalyptic number.

It is an amenable number.

686388113 is a deficient number, since it is larger than the sum of its proper divisors (1).

686388113 is an equidigital number, since it uses as much as digits as its factorization.

686388113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 686388113 is about 26199.0097713635. The cubic root of 686388113 is about 882.1110272903. Note that the first 3 decimals are identical.

The spelling of 686388113 in words is "six hundred eighty-six million, three hundred eighty-eight thousand, one hundred thirteen".