681018 has 16 divisors (see below), whose sum is σ = 1466976. Its totient is φ = 209520.

The previous prime is 681011. The next prime is 681019. The reversal of 681018 is 810186.

It is not an unprimeable number, because it can be changed into a prime (681011) 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, 4288 + ... + 4443.

It is an arithmetic number, because the mean of its divisors is an integer number (91686).

2⁶⁸¹⁰¹⁸ is an apocalyptic number.

681018 is an abundant number, since it is smaller than the sum of its proper divisors (785958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681018 is a wasteful number, since it uses less digits than its factorization.

681018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 681018 is about 825.2381474459. The cubic root of 681018 is about 87.9804536477.

The spelling of 681018 in words is "six hundred eighty-one thousand, eighteen".