100205986 has 16 divisors (see below), whose sum is σ = 157670784. Its totient is φ = 47672064.

The previous prime is 100205969. The next prime is 100205993. The reversal of 100205986 is 689502001.

It is an unprimeable number.

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, 3235 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (9854424).

Almost surely, 2^100205986 is an apocalyptic number.

100205986 is a deficient number, since it is larger than the sum of its proper divisors (57464798).

100205986 is a wasteful number, since it uses less digits than its factorization.

100205986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 100205986 is about 10010.2940016765. The cubic root of 100205986 is about 464.4773655575.

Adding to 100205986 its reverse (689502001), we get a palindrome (789707987).

The spelling of 100205986 in words is "one hundred million, two hundred five thousand, nine hundred eighty-six".