681000681 has 16 divisors (see below), whose sum is σ = 921123648. Its totient is φ = 447480000.

The previous prime is 681000631. The next prime is 681000701. The reversal of 681000681 is 186000186.

It is not a de Polignac number, because 681000681 - 2⁷ = 681000553 is a prime.

It is a super-2 number, since 2×681000681² = 927523855044927522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681000631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63831 + ... + 73731.

It is an arithmetic number, because the mean of its divisors is an integer number (57570228).

Almost surely, 2^681000681 is an apocalyptic number.

It is an amenable number.

681000681 is a deficient number, since it is larger than the sum of its proper divisors (240122967).

681000681 is a wasteful number, since it uses less digits than its factorization.

681000681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 681000681 is about 26095.9897493849. The cubic root of 681000681 is about 879.7970782974.

The spelling of 681000681 in words is "six hundred eighty-one million, six hundred eighty-one", and thus it is an aban number.