686369947 has 2 divisors, whose sum is σ = 686369948. Its totient is φ = 686369946.

The previous prime is 686369923. The next prime is 686370001. The reversal of 686369947 is 749963686.

686369947 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 not a de Polignac number, because 686369947 - 2⁷ = 686369819 is a prime.

It is a super-3 number, since 3×686369947³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 686369891 and 686369900.

It is not a weakly prime, because it can be changed into another prime (686369447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343184973 + 343184974.

It is an arithmetic number, because the mean of its divisors is an integer number (343184974).

Almost surely, 2^686369947 is an apocalyptic number.

686369947 is a deficient number, since it is larger than the sum of its proper divisors (1).

686369947 is an equidigital number, since it uses as much as digits as its factorization.

686369947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 58.

The square root of 686369947 is about 26198.6630765770. The cubic root of 686369947 is about 882.1032452158.

The spelling of 686369947 in words is "six hundred eighty-six million, three hundred sixty-nine thousand, nine hundred forty-seven".