681023 has 8 divisors (see below), whose sum is σ = 783360. Its totient is φ = 579960.

The previous prime is 681019. The next prime is 681041. The reversal of 681023 is 320186.

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

It is a cyclic number.

It is not a de Polignac number, because 681023 - 2² = 681019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680986 and 681004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718 + ... + 2076.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁶⁸¹⁰²³ is an apocalyptic number.

681023 is a deficient number, since it is larger than the sum of its proper divisors (102337).

681023 is a wasteful number, since it uses less digits than its factorization.

681023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 681023 is about 825.2411768689. The cubic root of 681023 is about 87.9806689632.

The spelling of 681023 in words is "six hundred eighty-one thousand, twenty-three".