686064319 has 2 divisors, whose sum is σ = 686064320. Its totient is φ = 686064318.

The previous prime is 686064307. The next prime is 686064343. The reversal of 686064319 is 913460686.

686064319 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-686064319 is a prime.

It is a super-2 number, since 2×686064319² = 941368499609867522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686064719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343032159 + 343032160.

It is an arithmetic number, because the mean of its divisors is an integer number (343032160).

Almost surely, 2^686064319 is an apocalyptic number.

686064319 is a deficient number, since it is larger than the sum of its proper divisors (1).

686064319 is an equidigital number, since it uses as much as digits as its factorization.

686064319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 686064319 is about 26192.8295340538. The cubic root of 686064319 is about 881.9722976235.

The spelling of 686064319 in words is "six hundred eighty-six million, sixty-four thousand, three hundred nineteen".