104186985 has 48 divisors (see below), whose sum is σ = 195076800. Its totient is φ = 47343744.

The previous prime is 104186983. The next prime is 104186989. The reversal of 104186985 is 589681401.

It is not a de Polignac number, because 104186985 - 2¹ = 104186983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (104186983) 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 47 ways as a sum of consecutive naturals, for example, 168006 + ... + 168624.

It is an arithmetic number, because the mean of its divisors is an integer number (4064100).

Almost surely, 2^104186985 is an apocalyptic number.

104186985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

104186985 is a deficient number, since it is larger than the sum of its proper divisors (90889815).

104186985 is a wasteful number, since it uses less digits than its factorization.

104186985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 104186985 is about 10207.2026040439. The cubic root of 104186985 is about 470.5486049056.

The spelling of 104186985 in words is "one hundred four million, one hundred eighty-six thousand, nine hundred eighty-five".