686760647 has 2 divisors, whose sum is σ = 686760648. Its totient is φ = 686760646.

The previous prime is 686760623. The next prime is 686760671. The reversal of 686760647 is 746067686.

It is a balanced prime because it is at equal distance from previous prime (686760623) and next prime (686760671).

It is a cyclic number.

It is not a de Polignac number, because 686760647 - 2⁶ = 686760583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686760595 and 686760604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686760617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343380323 + 343380324.

It is an arithmetic number, because the mean of its divisors is an integer number (343380324).

Almost surely, 2^686760647 is an apocalyptic number.

686760647 is a deficient number, since it is larger than the sum of its proper divisors (1).

686760647 is an equidigital number, since it uses as much as digits as its factorization.

686760647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The square root of 686760647 is about 26206.1185031282. The cubic root of 686760647 is about 882.2705856652.

The spelling of 686760647 in words is "six hundred eighty-six million, seven hundred sixty thousand, six hundred forty-seven".