685781726 has 16 divisors (see below), whose sum is σ = 1175961984. Its totient is φ = 293822424.

The previous prime is 685781711. The next prime is 685781729. The reversal of 685781726 is 627187586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685781729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91061 + ... + 98303.

It is an arithmetic number, because the mean of its divisors is an integer number (73497624).

Almost surely, 2^685781726 is an apocalyptic number.

685781726 is a deficient number, since it is larger than the sum of its proper divisors (490180258).

685781726 is a wasteful number, since it uses less digits than its factorization.

685781726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14015.

The product of its digits is 1128960, while the sum is 50.

The square root of 685781726 is about 26187.4345058847. The cubic root of 685781726 is about 881.8511848652.

The spelling of 685781726 in words is "six hundred eighty-five million, seven hundred eighty-one thousand, seven hundred twenty-six".