685280567 has 2 divisors, whose sum is σ = 685280568. Its totient is φ = 685280566.

The previous prime is 685280521. The next prime is 685280597. The reversal of 685280567 is 765082586.

685280567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685280567 - 2²⁴ = 668503351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685280597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342640283 + 342640284.

It is an arithmetic number, because the mean of its divisors is an integer number (342640284).

Almost surely, 2^685280567 is an apocalyptic number.

685280567 is a deficient number, since it is larger than the sum of its proper divisors (1).

685280567 is an equidigital number, since it uses as much as digits as its factorization.

685280567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 685280567 is about 26177.8640648927. The cubic root of 685280567 is about 881.6363179762.

The spelling of 685280567 in words is "six hundred eighty-five million, two hundred eighty thousand, five hundred sixty-seven".