100724681 has 8 divisors (see below), whose sum is σ = 106145280. Its totient is φ = 95316048.

The previous prime is 100724639. The next prime is 100724683. The reversal of 100724681 is 186427001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100724681 is a prime.

It is a super-2 number, since 2×100724681² = 20290922725103522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100724683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18215 + ... + 23091.

It is an arithmetic number, because the mean of its divisors is an integer number (13268160).

Almost surely, 2^100724681 is an apocalyptic number.

It is an amenable number.

100724681 is a deficient number, since it is larger than the sum of its proper divisors (5420599).

100724681 is a wasteful number, since it uses less digits than its factorization.

100724681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5983.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 100724681 is about 10036.1686414687. The cubic root of 100724681 is about 465.2774095271.

The spelling of 100724681 in words is "one hundred million, seven hundred twenty-four thousand, six hundred eighty-one".