100905986 has 8 divisors (see below), whose sum is σ = 151481340. Its totient is φ = 50412208.

The previous prime is 100905971. The next prime is 100906019. The reversal of 100905986 is 689509001.

It can be written as a sum of positive squares in 2 ways, for example, as 100380361 + 525625 = 10019^2 + 725^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17201 + ... + 22308.

Almost surely, 2^100905986 is an apocalyptic number.

100905986 is a deficient number, since it is larger than the sum of its proper divisors (50575354).

100905986 is a wasteful number, since it uses less digits than its factorization.

100905986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40788.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 100905986 is about 10045.1971608326. The cubic root of 100905986 is about 465.5564095233.

The spelling of 100905986 in words is "one hundred million, nine hundred five thousand, nine hundred eighty-six".