103809985 has 4 divisors (see below), whose sum is σ = 124571988. Its totient is φ = 83047984.

The previous prime is 103809967. The next prime is 103810013. The reversal of 103809985 is 589908301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 67617729 = 6016^2 + 8223^2 .

It is a cyclic number.

It is not a de Polignac number, because 103809985 - 2¹⁵ = 103777217 is a prime.

It is a Duffinian number.

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, 10380994 + ... + 10381003.

It is an arithmetic number, because the mean of its divisors is an integer number (31142997).

Almost surely, 2^103809985 is an apocalyptic number.

It is an amenable number.

103809985 is a deficient number, since it is larger than the sum of its proper divisors (20762003).

103809985 is an equidigital number, since it uses as much as digits as its factorization.

103809985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20762002.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 103809985 is about 10188.7185160843. The cubic root of 103809985 is about 469.9803598251.

The spelling of 103809985 in words is "one hundred three million, eight hundred nine thousand, nine hundred eighty-five".