685703799 has 20 divisors (see below), whose sum is σ = 1117444680. Its totient is φ = 415577520.

The previous prime is 685703797. The next prime is 685703813. The reversal of 685703799 is 997307586.

685703799 is a `hidden beast` number, since 68 + 570 + 3 + 7 + 9 + 9 = 666.

It is not a de Polignac number, because 685703799 - 2¹ = 685703797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685703797) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 383904 + ... + 385685.

It is an arithmetic number, because the mean of its divisors is an integer number (55872234).

Almost surely, 2^685703799 is an apocalyptic number.

685703799 is a deficient number, since it is larger than the sum of its proper divisors (431740881).

685703799 is a wasteful number, since it uses less digits than its factorization.

685703799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769612 (or 769603 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 685703799 is about 26185.9465935452. The cubic root of 685703799 is about 881.8177813211.

The spelling of 685703799 in words is "six hundred eighty-five million, seven hundred three thousand, seven hundred ninety-nine".