686342113 has 2 divisors, whose sum is σ = 686342114. Its totient is φ = 686342112.

The previous prime is 686342093. The next prime is 686342123. The reversal of 686342113 is 311243686.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569442769 + 116899344 = 23863^2 + 10812^2 .

It is a cyclic number.

It is not a de Polignac number, because 686342113 - 2²¹ = 684244961 is a prime.

It is not a weakly prime, because it can be changed into another prime (686342123) 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 as a sum of consecutive naturals, namely, 343171056 + 343171057.

It is an arithmetic number, because the mean of its divisors is an integer number (343171057).

Almost surely, 2^686342113 is an apocalyptic number.

It is an amenable number.

686342113 is a deficient number, since it is larger than the sum of its proper divisors (1).

686342113 is an equidigital number, since it uses as much as digits as its factorization.

686342113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 686342113 is about 26198.1318608789. The cubic root of 686342113 is about 882.0913212314.

Adding to 686342113 its reverse (311243686), we get a palindrome (997585799).

The spelling of 686342113 in words is "six hundred eighty-six million, three hundred forty-two thousand, one hundred thirteen".