681118 has 4 divisors (see below), whose sum is σ = 1021680. Its totient is φ = 340558.

The previous prime is 681113. The next prime is 681127. The reversal of 681118 is 811186.

It is a happy number.

681118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 681092 and 681101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681113) by changing a digit.

681118 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170278 + ... + 170281.

It is an arithmetic number, because the mean of its divisors is an integer number (255420).

2⁶⁸¹¹¹⁸ is an apocalyptic number.

681118 is a deficient number, since it is larger than the sum of its proper divisors (340562).

681118 is a wasteful number, since it uses less digits than its factorization.

681118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340561.

The product of its digits is 384, while the sum is 25.

The square root of 681118 is about 825.2987337928. The cubic root of 681118 is about 87.9847597575.

The spelling of 681118 in words is "six hundred eighty-one thousand, one hundred eighteen".