100681405 has 8 divisors (see below), whose sum is σ = 131801184. Its totient is φ = 73222800.

The previous prime is 100681391. The next prime is 100681421. The reversal of 100681405 is 504186001.

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

It is not a de Polignac number, because 100681405 - 2⁷ = 100681277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100681405.

It is a congruent number.

It is an unprimeable number.

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, 915231 + ... + 915340.

It is an arithmetic number, because the mean of its divisors is an integer number (16475148).

Almost surely, 2^100681405 is an apocalyptic number.

It is an amenable number.

100681405 is a deficient number, since it is larger than the sum of its proper divisors (31119779).

100681405 is a wasteful number, since it uses less digits than its factorization.

100681405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830587.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 100681405 is about 10034.0124078058. The cubic root of 100681405 is about 465.2107650550.

The spelling of 100681405 in words is "one hundred million, six hundred eighty-one thousand, four hundred five".