681785714 has 8 divisors (see below), whose sum is σ = 1082836188. Its totient is φ = 320840320.

The previous prime is 681785669. The next prime is 681785719. The reversal of 681785714 is 417587186.

It can be written as a sum of positive squares in 2 ways, for example, as 522899689 + 158886025 = 22867^2 + 12605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (681785719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10026227 + ... + 10026294.

Almost surely, 2^681785714 is an apocalyptic number.

681785714 is a deficient number, since it is larger than the sum of its proper divisors (401050474).

681785714 is a wasteful number, since it uses less digits than its factorization.

681785714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20052540.

The product of its digits is 376320, while the sum is 47.

The square root of 681785714 is about 26111.0266745680. The cubic root of 681785714 is about 880.1350145804.

The spelling of 681785714 in words is "six hundred eighty-one million, seven hundred eighty-five thousand, seven hundred fourteen".