100681 has 8 divisors (see below), whose sum is σ = 121280. Its totient is φ = 81648.

The previous prime is 100673. The next prime is 100693. The reversal of 100681 is 186001.

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

It is not a de Polignac number, because 100681 - 2³ = 100673 is a prime.

It is a super-2 number, since 2×100681² = 20273327522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (15160).

2¹⁰⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

100681 is a deficient number, since it is larger than the sum of its proper divisors (20599).

100681 is an equidigital number, since it uses as much as digits as its factorization.

100681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 100681 is about 317.3026945993. The cubic root of 100681 is about 46.5210141270.

Adding to 100681 its reverse (186001), we get a palindrome (286682).

The spelling of 100681 in words is "one hundred thousand, six hundred eighty-one".