686868263 has 2 divisors, whose sum is σ = 686868264. Its totient is φ = 686868262.

The previous prime is 686868257. The next prime is 686868307. The reversal of 686868263 is 362868686.

686868263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686868263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686868253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343434131 + 343434132.

It is an arithmetic number, because the mean of its divisors is an integer number (343434132).

Almost surely, 2^686868263 is an apocalyptic number.

686868263 is a deficient number, since it is larger than the sum of its proper divisors (1).

686868263 is an equidigital number, since it uses as much as digits as its factorization.

686868263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 53.

The square root of 686868263 is about 26208.1716836562. The cubic root of 686868263 is about 882.3166674516.

The spelling of 686868263 in words is "six hundred eighty-six million, eight hundred sixty-eight thousand, two hundred sixty-three".